While Google says Android devices total 135m, we don't have totals on Android tablets-- until now, as Daring Fireball's John Gruber estimates Android tablets total 1.21m.

How did he achieve such a calculation? Google itself says 0.9% of activated in-use devices are "tablets" (as in having screens 7" or larger). Following Larry Page's announcing that Android devices now total 135m (at Google's quartely analyst call), a bit of mathematics is all that's required.

Compare this to Apple's iPad sales, now totalling 28.73m-- 24x greater than Android tablets, according to Business Insider SAI. 2011 iPad sales alone still outnumber total Android tablet sales 12:1.

The conclusion? Google and its partners need shift tablet gears, if they're to stop Apple's tablet race domination-- and hope for a repeat of Android's smartphone success.

Go More Evidence of Low Sales of Android Tablets (Daring Fireball)

Go iPads Have Outsold Android Tablets 24:1 (Business Insider SAI)