I would like to point out that Les Jackson (Dallas Stars head of scouting / former GM) indicated that the Stars had OEL, Kadri, Glennie, and Kulikov ranked very close togather as their #6 through #9 prospects on the board, and they took the best one remaining (he didn't say if they had Glennie ranked ahead of OEL or Kadri). So that should tell you that obviously the Stars saw something they didn't like in MPS, because they didn't even consider him a potential choice at their draft position.
I was kind of upset at first that the Stars passed on two prospects that were nearly universally ranked higher on the scouting lists then Glennie, but after hearing Jackson and co. talk about him I am actually pretty confident that Dallas got the right guy. They see him as a Brenden Morrow type player with better goalscoring ability - although it remains to be seen in the next couple years if Glennie turns into the physical monster that Morrow is. The Scouts seem sure that he has that element in him, so I can't wait to see him play next season.
Also someone mentioned that they highly doubted the fact that Glennie won't play in the NHL until 2012-13, but believe me the Stars are 100% commited to having every prospect play atleast 1 full season in the AHL before they get their shot in the big league, and Glennie won't be eligible to play in the AHL until 2011-12 due to his age. They think that it helps prepare a player for the NHL like no other league. Fabian Brunnstrom is the one "exception" I guess, and not playing in the AHL was a condition of his contract. He probably could have used it though, as it turned out the defensive side of his game was nowhere near good enough.
***That's very interesting theory about Dallas trading back - I remember all the speculation about John Moore and how high the team was on him - to the point where there was actually people thinking they might end up taking him at #8.