What he's really thinking is how few good people they leave for Microsoft. Nearly everyone who gets an offer from both must choose Google. So the more people Google hires each year, the lower down the list Microsoft's top recruits start.
Was it really different 5 or 10 years ago though? Microsoft hasn't been a cool company for a long time. Although I guess it was very impressive for the resume, and prior to Google, that was a choice you'd have to make.
