Several things one could gather from Seth's data for 15 drafts by the Twins. While nearly all 1st round draft picks made the majors, less than half had significant big league careers. Less than 40% of the players taken in the first 10 rounds ever played in the majors. Over the 15 years listed here, only about a dozen, drafted and signed after the 10th round had significant big league careers.(that is a judgement call).
I don't know how important these "facts" are or how they compare to other teams. It does point out how difficult it is to get to the majors and carve out a career there.