Quick nit-promote (nit-picking in order to agree even more), elite professional programs generally have attrition rates even lower than 3%. Columbia law school has an attrition rate of .3%. Yale and Stanford law schools have no attrition. [1]

http://taxprof.typepad.com/taxprof_blog/2008/04/law-school-r...

[1] just noticed that these are 1L attrition rates. So actual rates may be a bit higher.