I got into Avalon the day it released, so whatever the level cap was before that! LOL, honestly so many people are obsessed with level in this game, if you keep going we all wind up in the same place so its pretty irrelevant imo.
I JUST got in yesterday after soloing the Jade Oni in Mooshu (not a bad feat for a Life Wizard).
After doing nearly every side quest and finishing Wintertusk, my wizard was at high level 76 and actually leveled up to 77 after the first Dragon battle.