Let's assume Google Buzz is undeniably better than Facebook.
Let's also assume no one is really invested in the 90% of Facebook functionality that Google Buzz doesn't address.
Hell, let's assume any user who tries Google Buzz will instantly declare eternal allegiance to Larry and Sergey and immediately delete their Facebook account.
Even with all those dramatically dubious flamebait claims, how the hell is Google going to get everyone to try Buzz. Since when do better products automatically win in the tech marketplace? If Calacanis is going for pageviews then I say well-played, but if he actually believes this tripe then he's dumber than he is arrogant.