I never understood the elastic effect trick anyway.
Apparently you don't train the weakness of your player until he is were you want him to be at his other skills, then you use the elastic effect to train his weakness quicker than normal?
Ok, so training his weak skill was quicker. However, where is the evidence that the time you save training that weak skill isn't negated by the fact it took you longer for his other skills?
"Air is beautiful, yet you cannot see it. It's soft, yet you cannot touch it. Air is a little like my brain." - Jean-Claude Van Damme