I followed AP's basic premise (well away from rear and side walls, toe'd in, sitting slightly about 5' from the speakers with the speakers about 5' apart) and it works very well. I'm using Spica angelus in a small room and the imaging is excellent. I didn't do any elaborate mapping of the room ... just followed the basic setup and experimented a little.
I think AP's most salient point was to try to remove reflections from side walls which cause the brain to become confused over the location of the source of a sound. This is done by sitting as close to the speakers as is allowed by driver integration, by toeing in, and by maintaining some distance from the side walls (or placing objects at the side walls to break up the reflections).
Overall I'd have to say I'm a big fan of their web page on speaker placement as it explains its reasoning very clearly and logically, and it took the performance of my modest system to a whole new level.
There was a comment above about sitting disconcertingly close to the speakers and I think this is true ... it looks really odd at first to have the speakers so close and so far apart ... but the image size is the reward for such an odd setup. I don't have to worry about WAF since I have a dedicated listening room, but I can see WAF being a critical issue for some.
Finally here's the link :
http://www.audiophysic.de/produkte/aufstellung/aufstellung_e.html
