I have ~ 16% in a combination of Wellesley and Wellington. I am a little surprised at some of the high allocations mentioned in this thread. I have always had a general rule of thumb to invest no more than 10% in any one fund, and I'm probably pushing that due to the overlap between Wellesley and Wellington.
Doing things today that others won't, to do things tomorrow that others can't. Of course I'm referring to workouts, not robbing banks.