I look at more than PM records. Kelly and Kendra may have gone 3-0 as PMs, but based on what I saw throughout the season (which is obviously edited) I don't see them as stars. Bill had a good record as PM, but he also seemed like a star in other tasks as well. I remember when the guys lost the Planet Hollywood task he wasn't the PM, but he excelled as the restaurant manager. Bill never really had a weak task, if I remember right. Hell, the fact that we never see Kelly but still see Bill all the time (including a quick cameo) tells me that Bill is better.

Now, Kwame never really showed much, but I would put Amy, Troy, and maybe Nick alongside any of this year's final 3. They all showed more drive, creativity, and pure talent than these 3 have (in my opinion).