UK providers really do suck at this. Well done to Vodafone for being well ahead of the curve but I've got a feeling many of us will be waiting weeks, maybe a month or so for the update.
Surely they must know when they're planning to roll it out?
Any update is always like this (except with iOS, but then they get their fair share of problems). It's always staggered over a couple of months, and I think just about every mobile provider in the world are just as bad as each other!
I'm sure Nokia have their own internal schedule, but that relies on all the networks giving their approval on time - most are notoriously variable and so realistically it wouldn't be sensible for Nokia to publish the timelines because they would look like idiots when the networks (inevitably) can't be bothered to do their job.
The advantage of Windows Phone/Nokia is that they actually produce websites like these which compare the different variants against each other, and are honest about which phones get what updates, which runs contrary to the absolute minefield that Android is. With Windows Phone, you can be fairly sure when you buy that you'll get at least one major upgrade in the lifetime of the phone, probably a few minor ones too, regardless of device. With Android, it's total and absolute pot luck as to whatever the manufacturer can be bothered to implement, then even more luck if your carrier can be bothered to do their bit too - which is exactly the problem Android now has, it has become so unbelievably fragmented that nobody can really support it properly anymore.