To be honest, I have to agree with SCR on the matter of Response. Experience does play quite a big part in a player's responsive behaviour and whilst it is true that this should not be completely based around age, it still plays a part. Younger players usually have a lower value for this, because they do not show the same awareness on the field that more experienced players do have.
The same goes for positional stats like Attack and Defence. Youngsters are usually not that familiar with taking a quality position in attack and defence yet due to their lack of experience and are thus rated lower than seasoned veterans. Which is realistic.
As team work, I don't agree that it is in particular related to age. That has more to do with a player's understanding with his team-mates, which can already be good at a young age without much experience in the first team. Any player can communicate and understand his fellow players well, or not. That's more so a maturity issue, hence younger players usually don't get a high rating for this but if a youngster is already mature at an early age it's very much so possible.
Anyway, these are just my views.