Inconsistently.
Jane's network has kept all the Bells' worlds - and every other world with a Janepoint stuck in due to its being attached to Downside - in temporal sync, but when Jane spluttered for just a moment, that was shot to hell.
Peace lost three seconds, because it was where Aegis torched; after that process was complete, Jane was there again. And as soon as a door between Peace and Milliways appeared, she could sync to her ansible hub in the Belltower and, from there, to everywhere else.
Atlantis and Sunshine each stand at about a minute apiece: Shell Bell's aura and Juliet's local copy of Jarvis both enabled them to get to Milliways immediately, pausing their homeworlds as standard for occasions when someone walks into the bar. Shell Bell's the one who connected Peace.
Everyone else was running on luck.
Luckiest is Rainbow, which lost only five hours.
Next is Alethia; in spite of Sherlock's mishap, it's fared reasonably well, spending only six weeks isolated.
Syntropy's just a little worse - seven weeks.
Origin waited two months.
Eos waited three.
Thilanushinyel, ten.
Everyone else is out a decade at least. Samaria's ten years, almost ten and a half.
Aurum is out eleven.
Rêverie has been separated for sixteen years.
All the Bells - and Elspeth, who was stuck in Downside for a day and a half on her end and whose mother was very upset - are collected in the Belltower, as are two Bell-attached Sherlocks who happened to be along for the ride. They all memorize this list of numbers. Aegis replaces her earpiece. And then they all go home to notify their loved ones and staff that there's a party cooking in the Belltower.
(Shell Bell, who has no particular cause on her own account to be distressed, sends her Sherlock to invite Tony in while she refits the Belltower to suit a party of a peal of Bells and their larger-than-last-encountered families and circles of friends.)
Stella is wandering around, between conversations at the moment, keeping her ears open for something interesting.
She opens her mouth.
She closes her mouth.
She says, "...Hi?"
"Hi. Is someone teleporting people around without asking?"
"Technically yes," says Aedyt. "But it's just Mummy helping, so it's okay."
"Ki...ind of," she says. "I'm Aedyt. —Which you know already, because nametags."
"Yeah. I'm gonna guess - Kerron's little sister? What'd you want to talk about?"
"Kerron's little sister," she agrees. "The Joker's daughter. Who grew up on stories of how he met Dad, but never actually talked to you, and - I don't know, I just wanted to... see what you're like, I guess?"
"I'm an approximately prototypical Bell," shrugs Stella. "Not far off from Golden except for vampire stuff."
"She's not very sociable without her princess. Is what I'm told, anyway, the princess has been gone longer than I've been alive, so I've never seen her majesty any other way."
"Why me, with a dozen of us running around? Or - no, on reflection that's obvious, I'm the one who happened to run into your mum before we knew much about the template and put him on an asteroid."
"You want me to explain myself? I think my reasoning's pretty well known, but maybe you haven't happened to hear it."
"He never says why exactly, he just says he doesn't blame you and lets me guess the rest."
"Hmm." Stella taps her foot. "Okay - keep in mind that at this time all I knew about alts was that Golden existed. Me and Golden have the exact same childhood except that some of her father's old friends are werewolfish and mine has a different set - other than that there are no discrepancies. The only difference was, she moved to Forks and she found vampires. I moved to Forks and found wishcoins. It's a standard setup - Pattern moves to Forks and finds a killer van, Aurora moves to Forks and finds a Device, Juliet has Sunnydale instead but she moved at the same time for the same reasons and found vampires of a different sort. And then there's the variants, but I didn't know any of that, I only knew there was me, and there was Golden." She sighs. "And there was Alice - and there was the Joker."
"And I liked Golden from the start. We get each other. The Joker, on the other hand, was an unpleasant surprise. Keep in mind that at this time I also didn't know about Downside. And if I had, it might not have helped much, because we hadn't revamped it yet and there were no plans in place to do so. To the very best of my knowledge at that time, killing someone was condemning them to permanent oblivion. I didn't know that a bit later we'd find lots of other Bells, Pattern among them, and take over the afterlife, and have Jane, and that Pattern would be able to set up a program to resurrect every single person your mum ever killed, among others. To the very best of my knowledge, I was sitting at a table with someone who - if only he'd had a slightly different history - could have been my boyfriend, or just like him anyway. And this person had killed a bunch of people and had utterly no intention of stopping, because he wanted a certain someone's attention."