Ivy with oldest students -Columbia?

<p>I started this thread, and it had a lot of good information, but I can't find it anymore. I've seen most of the Ivies, and it seemed like Columbia students were much older than any other Ivy. Did anybody else think the same thing? I mean, I saw 25-35 yr-olds as the norm....most other Ivies had 16-28 yr-olds. That seemed unusual.</p>