Yeah, I agree that age is overblown when evaluating prospects. I don't really care if a guy is young for his class or vice versa cause I don't see how it makes a difference. Maybe if you're really concerned that a player is undersized and they're still a teenager that works in their favor as they could still be growing but I try not to penalize prospects for being 21 or 22 if they're dominating. The only thing I do look at age-related is that I try to compare players at the same point in their development. So I'll compare everybody's Freshman year for instance not just look at what they did this season. I think you have to account for the fact that prospects tend to get better with age and allow for a certain degree of expected improvement in your evaluation. That doesn't mean it's a given that everybody is going to improve dramatically though and if a guy makes a huge jump in his Sophomore/Junior/Senior season you've got to trust what you see and remember that they're still very young compared to the average NBA vet.
So using myself as an example, I'm always more interested in skill level than I am athleticism. Don't get me wrong, I love if a player has both, but if I have to choose, I'll go with skill level 90% of the time.