To answer your question generally (that is, not specifically related to this particular departure) Google was the coolest place to work for the last decade. A

To answer your question generally (that is, not specifically related to this particular departure) Google was the coolest place to work for the last decade. All of the sudden, high profile people are leaving for Facebook. I'm not arguing that this is proof of some underlying flaw of Google or anything conspiratorial like that, but it certainly qualifies as interesting to people who might end up making a choice between the two companies (either as an employer or as a platform on which to develop). Additionally, it's not completely unlikely that there's a small group of Facebook employees who are very happy when high-profile people join Facebook. It certainly makes me happy, and I haven't even started yet.