I'm not sure but I don't think so.
it is ment for 'helpfull' skills.
e.g. if you train someone with average inside defense in blocking, he will train faster than a player with awfull inside defense. But I doubt that a player with awfull jumprange will train slower than one with average jumprange if you train blocking....
I also believe this diffrence to be minor. Say if you train the one guy for a period of 5 pops, the other might only have 4 pops. I don't think one will pop twice while the other won't... age will be more important here, and height also has some influence.
At this stage we know to little to make clear and certain statements, it's still a bit guessing.
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