I never said the WASP method is the end of the road. It is simple and quick method to find a good spot for the speakers. (Good. probably not the best). It was developed by Dave Wilson as a method that he could teach his dealers to quickly setup speakers. Dealers don't have days or weeks to setup speakers. The other thing is the zone it finds is relatively close to the font wall which is where most people in a "normal" living environment want their speakers. The thing Dave never mentions is that you can find other "zones" in the room where your voice will sound natural. Look at the pictures of the setup of the speakers in his room. They are well out from the wall. But that is irrelevant for a dealer setting up a pair of speakers because 99% of their clients can't or won't put the speakers that far away from the wall.This is a pretty low bar test to find the least worst reverberent field in the room around the vocal range ... I don't think it tells you a great deal.
In my living room I have a perforated corrugated metal ceiling with an absorbtion coefficient of 1
My voice sounds exactly the same against the wall or anywhere else in the room ... so it changes with acoustic design.
I guess this assumes no acoustic treatment of the space
A delayed , correlated reverberent tail in the listening area is what you want... that is both clear and lively
Phil
Rex is exploring "HOW" to do this. He needs some structure and he needs to develop some listening skill. IMHO the first skill anyone needs to acquire is how to find spots where the bass works. The WASP method does a good job of that.