I agree that it looks pretty bad, but for the sake of playing Devil's, er, Don's Advocate: maybe he was feeling down from being unexpectedly let go from MSFT, and is now having a rebound where everything about his new job looks extra rosy? Just saying there's a human/personal element at play here too.
I can understand feeling down after being fired. I can't understand magically having opinions opposite to those you held when employed by your new employer's competitor. The flippant and unprofessional tone just exacerbates the problem.
I don't think any of his opinions expressed are actually a turnaround from his previous statements. He used to talk about the good things at Microsoft and not mention the bad things. Now he is talking about the good things at Google (with comparison to bad things at Microsoft), and not mentioning the bad things at Google (which I won't attempt to enumerate, since I work at Yahoo).
I think he is just trying to remain upbeat about his sudden and clearly quite wrenching departure from a job he loved at a company he respected.
