I Think that it's always satisfying to get the letter, whether it be your first or fifth. When you get two (or more) acceptances, you not only get to pick where you would (more) like to go, but you get to let another student into the school that you didn't choose (from their alternate list). As much as it would please me to hold out as long as possible with some of the "less helpful" admissions offices, I would really like to be able to give my extra spot to someone else who wants it.
Jd