If you're with a group that can melt big pulls, they will melt smaller but consistent regular pulls in no time flat. It really is just a couple of extra minutes.
If a team is taking 7 to 10 minutes longer with smaller pulls, they probably wouldn't have the dps to get that big pull down before the tanks and healers are out of CDs.
I have definitely had plenty of groups that insisted on wall to wall who should have dialed it back so we could melt the small pulls consistently instead.