Well lets do some quick math. U21 guards (some of the best talent on BB) finishing out their seasons at about an average of 112 TSP compared to the 104 TSP that existed prior to the gym AND YT being put into place. So in 4 seasons, 56 weeks of training, they got an extra 8 TSP from both YT and Gym. Lets be nice to the gym and say that it accounts for 6 of those 8 pops and YT is relatively useless. That means 6 additional pops in 56 weeks adds up to a pop about every 9 weeks from the gym. Proving that realistically you only get 1 pop or so per season with a level 3 gym.