Only about 10-20 people, accordng to Montauk's interviews with Deans in his book "How to get into the top law school", are ever really taken off the waiting lists, out of 200-300 people. That gives you about a 5-10% chance, and there's probably very little rhyme or reason to. Everyone on the wait list probably have a similar range of numbers and experiences.
Those spots aren't the number of people that they're going to pull off the waitlist, it's the total size of the waitlist, and I guarantee you they fill it. A waitlist the size of 360 is never a safe bet.