Based upon reading CF, it seems that many of the math profs are bad. It appears that my son got lucky in his Calc 1 class and has a prof with great reviews. Same with his English 250 prof. I am relieved at this. His Econ 101 class still has no prof assigned.
Math professors are fine as long as you take advantage of recitation and study sessions. The only times I had trouble with my "bad" (euphemism for foreign) professors was when I got lazy and expected to just show up to lecture and learn everything.