These have not yet been collected. Yes, I am considered even harder and more demanding than before, although I feel that I am teaching less content than ever before. I got the best reactions ever in abstract algebra. I taught it, which included cooperative learning, and the esprit de corps that developed in that class. I think instructor evaluations go down because students do not see the instructors behavior as teaching.
Comments are usually more possible if students have been involved in cooperative learning.
More enthusiasm about the subject. Relief and gratitude at completing a dreaded requirement. Lots of praise for me. More positive comments. There's probably less of a perception among students in required courses that the course is a boring experience, since the group work gets them actively engaged in doing something during the class period.