I keep meaning to watch this after seeing the adverts on sky one, but I've only managed to catch half an episode so far. From what I have seen, however, it's all general knowledge and (other than maths questions) has nothing to do with how "smart" the contestant is.
I certainly didn't get taught anything about pantomimes in primary school, and we weren't taught French or German until our last year. We didn't do any history either, other than project stuff like learning a little about the ancient Egyptians.
I'd like to see what primary school teachers make of it, but I doubt they'd agree that it's representitive of what kids are learning these days.