Gunnar,
I am an instructor at a TC-12 (King Air 200) squadron and teach all services the multi-engine perspective. From what I have seen the last 3 years doing this that those with 1000+ hrs do well in our advanced program. Most of the guard guys tend to be either below par or way above it. Reason I think is that some are content that they have a guard slot and don't work that hard. These tend to be right out of college and haven't had a lot of military time under thier belt. The other type are the young commuter guys that have busted their tails and fly well and love the fact that they are makming more money flying on AD than before.
The guard/reserve guys still stress over their other life and what job they will get to wait out the time building for the majors. The AD guys stress over their jobs because the pay is good but life can be hard with more deployments and etc...