That's just 5.38% of all Android activations worldwide in a day.
Of course, we have to assume that this number doesn't count any non-Google Android (NGA) tablets like the Kindle Fire, B&N Nook, or any of the other Android tablets that don't come with Google Apps. But, that still seems extremely low, especially given how quickly the Nexus 7 has been selling out. Given the numbers that we've seen, the Nexus 7 alone should make up about 33,000 activations per day (based on 3 million sold in 90 days), which is almost half of all Android tablet activations.
Schmidt readily admits that Google was "late to tablets", but even so, we would have guessed that between Samsung and Asus alone, Android could muster more activations than that.