I doubt that had anything to do with it - so far their schedule for rolling out the major update this year seems to be a repeat of their schedule for rolling ou

I doubt that had anything to do with it - so far their schedule for rolling out the major update this year seems to be a repeat of their schedule for rolling out the initial release last year (initial demo at MWC, developer info + initial CTP at Mix in April, eventual release in October, November) which to me strongly suggest they've always intended to be on an annual refresh schedule, with only minor out-of-band updates.