That's a, well let's call it an "interesting" conclusion. We could just look at the median ages of leagues without making broad-strokes statements on the Twins prospects, many of which are good despite your ridiculously pessimistic outlook. The latest info I could find, because all I'm willing to spend on this nonsense is a quick google search, was in 2013, where the Florida State League median was 23.5 years. For AA Southern League, it's 24.6 years: http://www.baseballamerica.com/majors/median-age-for-every-full-season-league/ Kohl Stewart is currently 22 years and 7 months old. Meaning that he's not only super young for his league, he'd be about a year younger than the median for the league below him. This is simple google searching that you could have done before making conclusory statements.