Hussar
Legend
Yeah, advancement may have been slower than 3e in a number of ways, but 10,000 fights or one level every 2 years really has no basis in any published version of D&D.
Hey, we finally agree on level advancement rates.

IME, in 3e, we advanced about 1 level/15-20 hours of play. Which, again, purely my own experience, was pretty much the exact same rate we advanced in 2e and 1e. Then again, I almost never played into double digit levels. That might make a big difference.