So Rangerwickett brings up the next question beyond the six stats... what about levels?
Now with the way the starting age is set up, it would seem that simply being 1st level requires training through the end of adolescence. So, I'd think that an average level 1 person is pretty much fresh out of high school. Maybe after you finish college, level 2 or 3? Graduate school for a 4? How long do you have to last in the professional workforce before you gain a level? What if your job never challenges you? Seems like leveling could be quite a long process.
The thing is, though leveling works awfully fast in the world of adventuring, it doesn't seem likely to be like that for most people. After all, 4th level represents a complete doubling of ALL your abilities. You are simply at least twice as good at everything than you were at level 1.
And what about class? I'd think most everyone is an expert, with even more experts than commoners, simply because we have an established educational system. Those who have spent time in the military or on a police force would be warriors or fighters, but don't forget, a 16 year old medival squire has been training extensively in combat most of his life, and he is still just a Ftr 1.