35 employees per Data Center for Microsoft's latest construction vs. Google's 200

In eWeek's interview with Microsoft's Mike Manos, says 35 employees per data center.

The Chicago-area data center is expected to be completed later in the summer of 2008, as are the other three data centers. Each center will employ about 35 people on a 24/7 basis, Manos said.

What is up with Google's 200 employees per data center:

1. Are they doing this to meet local employment commitments?
2. Are their data centers higher maintenance than what Microsoft builds?
3. Are they making up the #'s to fool the rest of us?

Most of us are stumped how and why Google needs so many employees in its data centers.