While its good to see a big Android supporter like Fred Wilson acknowledge the fragmentation issues, I think convincing any developers out there that this fragmentation is a good thing is going to be a really hard sell.

Beyond just the OEM customization, the whole Android install base is spread out among a number of different (often older) versions - this is not something you see with iOS where Apple does a great job of getting their install base to upgrade quickly to the latest major version.