[projectramo]

That's a good question.

So I have only taken Master's courses at two schools, but I have taken many courses at these schools, and a few online.

The professors were from famous institutes and from unfamous ones. It was a top 20 (but not top 10) school. So assuming that it was a wide sample, I think I have some sense of how good the courses are.

You are right in that they might have even clearer teaching at the top 4 (Stanford, MIT, CMU and Berkeley), though some of the teachers I worked with had taught at some of those schools and/or got PhDs there.