NotVerySmart makes a lot of good points, in my opinion (especially for someone who says he’s not very smart). One downside is that if you wait to make your deposit you’re likelihood of getting your preferred dorm goes down.
It would be interesting to see the data over the years on when commits are made which would help you to have your cake and eat it too as you “negotiate” with FA and Admissions. I would think that a bunch commit right after EA decisions, a bunch right after RD decisions, a bunch right after Ivy day, then then next biggest bunch within a week or two of the final date.