I'm reposting this for those who may have missed it up-thread:
I'm compiling training data for anyone who's interested to figure out exactly how much a trainee's characteristics (age, height, potential, etc) affect his training. This will eventually be very useful in figuring out which trainees to buy given teams needs/goals, and planning future training.
If you want to participate, BB-mail me the following info:
Trainer level, Training type, Position trained
Copy and paste each trained player's info (might take a couple bb-mails). After the first week, you can just send what you trained, and what pops you got.