I'd say Gingerbread will still be the most pre-installed Android version during all 2012.
What? There are still Froyo devices being sold now, as described in the article we are currently discussing:
That’s because every US carrier is still selling - even just now introducing - smartphones that will almost certainly never run Gingerbread and beyond.
Example: http://reviews.cnet.com/smartphones/huawei-impulse-4g-at/450...