Google has made market app stats available for developers:


http://www.androidcentral.com/google...veloper-portal

Interestingly, 86% of users are using v2.1 and v2.2 .

It would seem that claims of 'fragmentation' are somewhat overstated, however, I wonder how this will change when v2.3 hits the market en-mass as v2.1/2.2 was part of Android's explosive growth.

I would bet that at 86% for a major version (v2), android is actually less fragmented than other popular smartphone OSs.