For me, I'm not worried so much about the Twins rushing prospects (or not) as I am about the constant injuries in AAA. For Rodriguez and Jenkins, it seems like they have spent more time being hurt than they have playing. As we've seen with Lewis and Buxton, that can follow a player for a long time.
I'm excited for Mendez but he's only 22 with 80 plate appearances in AAA. Calling him up now probably does more harm than good.
The Twins have clearly thought about clearing a spot for Culpepper with Lee permanently moving to SS. That move will happen sooner rather than later.
So I guess that leaves Gonzalez. Could argue that with Kreidler and even Clemens (!!!) getting some run in centerfield, you can jettison Outman and give the young guy a chance.
But otherwise, there's really no one banging on the door in St. Paul or Wichita.
I do think the Twins have been more willing to get the young arms up to the majors and two of them (Abel / Rojas) are already dealing with injuries.