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.)
Elspeth cradles the baby Joker. "If I leave him here your husband will hurt him. Badly. Often. He's already started, just a little, and it will only get worse. The entire mess is overwhelmingly likely to end with you and your husband dead," she adds.
And she cues Jane, and she goes.
"Here he is," says Elspeth to the deck and peal. "I told his mother that she could send an email to anywhere in a few years, if she still wants him then, and we could talk about it. Also there will be no Voices coming from that world."
"Maybe something unisex. Or that's differently gendered depending on language maybe. Harley. Andrea."
"Am I going to be involved in some capacity here?" Jacob asks.
"Only when I'm asleep," Elsie says. "Which I can stop doing, if you'd rather."
"I realize the only constraint I explicitly put on you making me a grandmother was that I had to be at least forty-five, which I now am, but this is admittedly not how I expected it to go."
"And it'd be a little weird for him to have a Bell for a grandma," the Joker observes. "Y'know, considering." He makes a gesture that encompasses Kas, Micaiah, Jellybean, and Sue, who all happen to be standing next to one another.
Elspeth nods. "When the empire started up, not all the vampires could remember their original last names, if they ever had any. It's not like the Imperial software will break if I don't put anything in. Harley Andrea, no last name."
"Thanks," says Elspeth. "Do you want me to avoid having him around you too much while he's little?"
"...So, we were talking about networking Jarvises, let's talk to some Jarvises, Jane, can you relay for us? Is the original Sunshine one patched in yet?"
[Hey assorted Jarvises! Bells want to put nodes of you in all the worlds like I have as backup time-syncing in case anything happens to Aegis again or in case I have another failure mode we don't know about.]