Android ecosystem numbers). 1.2% of 480 million devices is 5.76, and .8% of last month's total (480 million minus 39 million (based on 1.3 million per day)) is 3.53 million. Nothing much there since all of that shift is mostly sales of JB devices, rather than updates except for a few Asus tablets.
Since last month, ICS bumped from 15.9% to 20.8%, and Gingerbread and Froyo both dropped slightly. Gingerbread is down from 60.6% to 57.2%, and Froyo is down from 15.5% to 14%.
There aren't any big devices expected this month, so we wouldn't really expect the numbers to move much until October.
source: Android Developers