I've worked with some really good engineers who came out of google, but I've worked with far more that were extremely arrogant but could not actually get anything done. One of the startups I worked at got an "advisor" from Google (as part of a startup program) that probably set us further back than it ever helped. Anytime this guy didn't understand something he just got extremely belligerent instead of actually trying to get the problem. In general his advice was ignored because it didn't make sense, and he never delivered on any of the promises he made. Not to harp on this guy, as he's just one example amongst many, but it's reached the point where if I see google engineers on the founding team for a company I typically won't consider working for them.

It turns out that being able to solve cute little puzzles while interviewing doesn't really help with systems level thinking.