You are not responsible for anyone's training but your own.
True, but as such, nobody should be held hostage to someone else's training or progress, either.
Flip_Side--I see your point I guess, but I think I'd be more worried about the situation Greg describes above--someone who has done the time, done the right number of hours, has the repertoire and the technique down, but is then required to "wait" because his senior isn't ready? That just doesn't seem right. It's not the guy's fault who's ready that someone had a baby, or got injured, or decided to take a break from training, or went to Afghanistan. There may be a lot of that last thing happening soon, will everyone in dojo worldwide have to put testing on hold until those folks get home and catch up?
IMHO, "sucks mightily" sums it up right nicely.