More than one reporter at Computer World has noticed,
Numerous top execs involved in its [Vista] development and launch are no longer at the company, at least in one instance because an exec was put in a position that was certainly a demotion.
There's clearly some scapegoating going on. These Microsoft employees, on their own, weren't the cause of Vista woes. The blame lies at the top, and at a culture that some say has gone from lean and mean to slow and bloated.
Another article from Computer World covers the same material from Gartner but downplays the news of departures.