What is the “perfect” length of a movie? According to a new poll of 2,000 Americans conducted by Talker Research, “the ideal average length” of a movie is just 92 minutes — just an hour and a half. It is not clear to me whether that number includes closing credits or not. Their report finds that “the average person wants to spend far less time at the movie theater going forward.” Only two percent of the people they spoke to — according to my rudimentary math, that means roughly 40 folks — want movies to be longer than two and a half hours. (Whoever you are out there, you 40 individuals, I love…