Well, the University of Illinois at Urbana-Champaign is a top 10 (arguably top 5) ranked CS department, and Michigan is no slouch, either. I agree with the gis

Well, the University of Illinois at Urbana-Champaign is a top 10 (arguably top 5) ranked CS department, and Michigan is no slouch, either. I agree with the gist of your point, though. The school you attend is considerably more important for grad school.