Mauer, Cuddyer, Morneau, and Kubel??  Their pitching staff includes Santana (Astros), Liriano, Bonser, and Nathan (Giants), Silva (Phillies), Guerrer (White Sox), and Reyes (Dodgers).  If anything, the Twins are adept at developing hitters and stealing pitchers from other teams.  

Their farm system is full of pitcher friendly parks, so I wouldn't write off all of their hitters yet.  Admittedly, they've loaded up on pitchers the last few years, but I still think that Parmelee and Revere look quite promising, and Lis and Ploufe could still contribute to a major league team.

The Twins have had a quite a few good hitting prospects that came up to the bigs and either stalled or got jerked around.

Look at Cuddyer. Took him several years to become a decent regular after being jerked from position to position.

Morneau had trouble adjusting, in part from the way the Twins coaches had him trying to adjust his approach. David Ortiz says the same thinga about his time in Minn.

And you can go back to guys like Ortiz and Todd Walker.

It certainly seems that there is some disconnect in that organization when it comes to what makes a good hitter.

from looking at the Youtube videos though, he motion is a lot like Andy Pettett.

I don't think Parmelee had a bad year at all, and I don't see any reason why he's not a solid B, marginal B+ prospect.  If you look at his peripherals BB%, K%, HR/AB, XBH/H, etc, he holds up very nicely compared to Travis Snider in the same league.  The major difference between Snider and Parmelee statistically is their hit rate, which can be driven by luck.  Snider had a .420 BABIP while Parmelee's was .312.  Add in the fact that the midwest league is a brutal league for power, and I cannot see why Parmelee should be downgraded so much.  His strike out rate is very troubling, but I don't think his year was bad when you take his age and league into context.  If he's a C+, then I would put Snider as a B.

MWL top 20 scouting report on him

"As many teenage pitchers do, Robertson faced some adjustments in his first full year as a pro. Even after he spent the first two months in extended spring training, the grind of the longer season sapped some of the juice out of his fastball, which dropped from 90-94 mph as an amateur to 86-90 this year.

The loss of velocity didn't faze Robertson, who had 143 strikeouts in 120 innings, including two stellar playoff starts. He piled up whiffs with a slider that he could get hitters to miss in the strike zone of chase off the plate. His big 6-foot-5 body gives him projection and good downward plane that creates a lot of groundballs.

Robertson has an unorthodox, stiff delivery that works for him now but could lead to problems down the road. It's deceptive and throws hitters' timing off, though it also puts a lot of stress on his shoulder."