Agreed. All I could think when reading the Google article was, "They really think OS X is inherently more secure?" Surely it just benefits from having fewer attackers bother to target it.
When that's the case, all the random scattershot viruses in the world become irrelevant, and your platform's inherent security mechanisms and development practices are the only things that matter.
So while everyone is scrambling to find holes in OSX to exploit in order to grab Google's data, Google secretly converts to plan9, never having intended to use OSX anyway. It's the greatest misdirection in history!
Nevertheless, my point was a counterargument to the idea that merely switching to windows and being "faster than the other bear bait" was enough for google, as it's not.