Well, it is a crit where raw power can be very helpful (but not necessarily, I'm small and a decent crit racer), but it's also only for determining the start grid, so the impact on the race outcome is probably not too great. It's a crit, not a cross race.
ETA: I'm planning to go to Athens Twilight, goal is to make the amateur final (top-25 finish in Cat 3). I hadn't realized there was a CompuTrainer qualifier for the amateurs as well.