I can't say what it's like on other data centers, but Primal hunt trains are pretty civil about waiting on people to load in. If you don't see BULLET TRAIN in the call, then you know there will be a 1-4 minute wait for changing zones just for those people.

Actually, I'm very thankful for cross world hunt trains. I was not usually able to be online when Hyperion ran their hunts, but I can always make one when I want to due to cross-worlding. As for too many people, all I can really say is party up and go tank. Generating enmity for your team is so appreciated, and no one will care that you can't tank. You're not really tanking anyway.