I think a lot of the really high end guys will make the jump fine, much like some of the 1st round talent that comes in from the NTDP, but after that your 2nd round talent and below will probably be hit and miss as to who can make an impact right away, if at all.
If they stay long enough like Dylan James, they should progress gradually, but the thing with CHL guys is they be more apt to bolt if they aren't seeing ice time or their stats aren't what they are used to playing in the wide open CHL.
Most guys are probably career oriented, but maybe guys from the CHL might be a little less interested in the schooling that goes along with it, as they could merely be using it as a stepping stone.