Did all of the above (except I have a girl, so circ wasn't really an issue). I did everyting "right" according to the wisdom of AP. And my daughter cried from the moment her eyes were open until the moment she fell asleep. All day, every day. She was--and is--VERY high needs. It has nothing to do with parenting style, imo, and everything to do with her personality. Some kids are just very intense. Having said that, however, I do believe that "AP" is the kindest, most appropriate response to that.
I think saying ap will equal 'kids like this' completely ignores the fact that everyone has different personalities, that no matter what you do to them, wont change who they are.