Hopefully Google's new "streamlined and integrated" philosophy will continue to reduce update times and further polish and unify the interface. Only time will tell.
It is nice to have a good new contender on the scene with Windows Phone though.
http://seattletimes.nwsource.com/html/microsoftpri0/20178567...
Previously, Microsoft provided exact details on when specific phones on specific carriers would be getting software updates, but this policy ended in January 2012:
http://arstechnica.com/microsoft/news/2012/01/microsofts-new...
I’ll point them towards Apple’s iOS and Microsoft’s Windows Phone instead. At least with these platforms, you’re guaranteed core OS updates and bugfixes for the length of your contract.
I think this just isn't true. Maybe WP is currently more homogeneous than Android but clearly MS is somewhat at the mercy of the carriers here too.