That's likely, especially since he's been teaching the course for 15 years; however, I can't take notes that quickly. When I do try, they almost always end up incomplete because they start talking again before I can get everything down. Just my sleep deprivation damaged brain slowing down I guess (which I think might also be a reason a lot of lecturers have a slow speech pattern).

I do still take some notes, particularly things that I think are important that might not be on the slides.