1) Good point, I just compared the "1-skill-trainingmodes". To be exact I wonder if players with training passing, ball handling, jump shot or rebounding and so on pop up after the same timeframe (With same circumstances like age, quantity of trained players, same influence of the complementary skills).
2) OK, I'll torture Oxidus ;-)
3) Yes, I asked if the growth of particular skills stays as quick if you don't train the complemantary skills too, but I read the rules again and it's clarified.