A while ago, I played around with a dataset that listed where startup founders (in that dataset) went to school:
http://talk.collegeconfidential.com/college-search-selection/1670732-interesting-data-of-where-startup-founders-went-for-undergrad-p1.html
By sheers numbers, Cal is up there with HSM while UIUC, UMich (and USC) would be in the middle of the Ivies.
Granted, those are all larger schools, but nobody is saying that those schools have Ivy-quality student bodies on average. It does show that the top tier at those schools do as well as Ivies, however.
If you look at CS majors only, UIUC and Cal only trail Stanford and MIT.
Heavyweight VC Marc Andreesen went to UIUC, BTW.
And while Perkins went to MIT, Kleiner went to what is now NYU Poly and Byers went to GTech.
Caufield graduated from the USMA.