Tommy Reinking of Twinkie Town wrote an article after compiling research about home grown Twins players and the WAR they've produced for the team.
It should be no surprise that the Twins have much better success developing hitters over pitchers. The pitching chart is pretty sad to look at. The team hasn't had a group of home grown pitchers average over 1.0 WAR per player since 2009.
It's possible that the current group we're hoping for in the minors bucks that trend. But I'm sure there were other hot pitching names we've been hoping for over the last 14 years that never worked out.