from the outside, Twitter seems to have more of the Valley-style engineering culture, and shares Google's API-oriented philosophy. Also there are some former G

from the outside, Twitter seems to have more of the Valley-style engineering culture, and shares Google's API-oriented philosophy. Also there are some former Googlers in key roles there. It's a good point about Google not getting social. Then again, Microsoft's also tried and failed to go social multiple times -- Windows Live Spaces, QnA, Groove, Hailstorm, and 3° are a few fairly-high-profile examples that leap to mind.