In theory, that's what a stat like poise should be for. This is where EA really messed up. Look at this simplified example:
Player A - 25 Years Old
Speed: 88
Acceleration: 86
Checking: 82
Slap Power: 87
Slap Accuracy: 83
Wrist Power: 88
Wrist Accuracy: 85
Strength: 83
Balance: 85
Deking: 85
Off Awareness: 86
Def Awareness: 82
Poise: 87
OVERALL: 86
Player A - 17 Years Old
Speed: 86
Acceleration: 84
Checking: 78
Slap Power: 86
Slap Accuracy: 80
Wrist Power: 86
Wrist Accuracy: 81
Strength: 80
Balance: 83
Deking: 83
Off Awareness: 84
Def Awareness: 79
Poise: 70
OVERALL: 74
Same player, 8 years apart in his development. Physical stats haven't changed TOO much, though they have improved. His poise has evolved the most and that is weighted much more heavily, thus improving his overall significantly. Poise acts as a multiplier on the value of the other attributes. There are 17 year olds in the OHL that are faster than NHLers. Some have better hands. Some shoot harder than many NHLers. It's their level of experience and competition they've performed against that separates them. So 17 points of poise result in a 12 point overall increase even though individual attributes have only gone up by 2-3 each. This way all leagues play realistically but the NHL has the highest average poise. This also makes room for highly skilled players who aren't strong/consistent performers as we often see in the NHL. They have the attributes in the right places but lack the poise. Poise could be seen as a maturity/consistency rating.