Wether or not those numbers are final, it sure makes one wonder how they are decided.
I wish it made some sense and could be explained, but it just can't. Well, I think most players are adjusted for their total to be where they want it to be, since the offensive and defensive awareness are the skills that most effect the total. So I get the feeling that the strongest skill might be at the right level, while the other is simply put where it needs to be for the player to be a 90, 91 or whatever.
I always adjust this myself before I start playing (using JFresh player cards). I just can't stand when fast players are not fast, players with confirmed hard shots are just average (because they are average or below average as a player). The game is so much more fun when players have their strengths and weaknesses.