@upgraded, I would be surprised if Apple released a fix for this right away. I would assume that with testing, approval for release, and so on (and they won't want to rush a fix for fear of adding even more bugs) that it'll be, I don't know, weeks probably?
My iphone 4s was starting to get long in the tooth for me anyway so I took the occasion to replace it with a newer phone, which came loaded with iOs 8.3, and a restore from backup with that iOs worked fine. I'll wait quite a while before risking the iOs upgrade next time. Apple does not have a good track record with their dot zero upgrades.
As we've all seen, the sketchy thing about OS upgrades is there's no going back. No way to revert to "how my phone was before I started this". (Well who knows maybe there's some way with jailbreaking but that's never interested me. I don't want an illegal phone...)