http://www.buzzerbeater.com/community/forum/read.aspx?thr...under this website are useful threads, but to answer your question depending on age and height, jump shot trains faster and yes if you train jump shot, you could go up from strong to proficient, then in another two-three weeks(ish) proficient to prominent.
Training speed analysis is a great tool. Dont train players that are older than 18 or 19 if u can afford to buy trainees get good ones with good primary skills.