Caltech or MIT, sure. I'm not as sure about Stanford though. Everyone I know at Stanford got in largely for legacy or athletics. While I have no doubt they'll be successful (based on their personalities and other intangibles) they're far from brilliant.

Additionally, as I wrote elsewhere on this thread, the networking benefits of an elite education primarily benefit those who had a good network in the first place. If you look at the type of student who lands a top finance or consulting job I'm sure you'll see the truth in this as well.