I bet you don't feel so warm when the enemy is able to make it over there with Rockets and kills you all because that person/you waited for everyone... Or someone who has been waiting close by Nova Bombs/Fist of Havocs everyone just when everyone is waiting for that last guy. Personally, I'll angle myself and look around the map. If I see people dead with respawn timers around or under 5 seconds, I'll wait a bit. Or if I see a couple team mates through the walls nearby and obviously making it over. But I won't wait more than 5-10 seconds... it's just putting everyone in harm's way. I'd rather blast the person coming to kill us all and save lives than wait for everyone to arrive.