I attended CalPoly, San Luis Obispo.
I've seen about 3 people use laptops in undergrad classes: One in an engineering class and two in computer science classes. In one of those cases the student was playing some first-person shooter and the professor caught him at it, so after that he didn't bring his computer in. (I think the fact that the student kept weaving his body back and forth clued the professor to walk over and see what he was doing.)
I've seen about 3 people use laptops in graduate engineering classes. These were used by industry-working professionals who were taking the class remotely via video teleconferencing. Since the notes were on powerpoint, I presume they were following along with their computers and taking notes on the slides.
Usually I saw computers during lab classes. There was one fellow who would take notes during lecture but his keyboard was very loud and a little distracting. It also didn't help that the desks in most classes were very teeny.