lol, it seems everybody likes all at once. Even if that's better than the slow roast, I think I would have a heart attack if all the schools rejected me on the same day.
This question doesn't make sense because if you submitted your apps and then got all of your rejections at once then you would also get all of your interviews at once and so that would be great either way because you would know all at once where you were definitely interviewing and where you definitely were not interviewing.