Why waste the time to queue to ST or CT in the first place? Granted I've done it on trash in CT before but never on bosses just to see how fast it would be but the reality of it is this. The queue itself is longer than downing 3 to 4 full mobs of water elementals and you can fully bond at that point. Secondly, if you aren't the only one doing it, the chances are higher to wipe the entire raid and cause you to stay in the raid the full length or till people decide to abandon which isn't prime. All in all its just time lost by doing it anyways.