No. I had more sex (both in terms of partners and frequency) in my last year at high school and, in particular, over the summer holidays between school and university. Great times.
In my first year at uni I did OK, I guess, but it was really in my second year that I majored in sex. How I got any work done and how it didn't wear out from overuse, I don't know.
In third year I'd got a steady girlfriend and so the sex was still plentiful but the variety was less. Just as well, because I needed to study, not chase pussy in that year...