David,
Dad is correct on what I meant. However, the thing is some waivers can take months, and meanwhile colleges have cut off dates for the deposit.
For our 1st 2 kids, their colleges made it very clear that although they guaranteed housing for freshman it was 1st come 1st serve for housing assignments. In other words, if you waited until April 15th, which was their last day it was due to pay the deposit, you would be at the bottom of the pile, and your chances of getting a triple or a quad were greatly increased.
It also meant that you would most likely go to the last orientation where you register for classes. The fear there is certain classes would be filled and that can become a scheduling issue for the fall.
Paying a deposit is a personal decision, and as I said before it can be a financial decision too. Neither is the right or wrong regarding their decision. You have to just dive in and not doubt your decision once it is made.