Nope - you're right it wasn't me in that thread
I recently posted some pics in the pioneer SC-09TX thread.
Glad you're enjoying your Maggies
Do you use yours just for music or a full HT setup?
I saw that pic myself not too long ago. Again, each situation is different, but (there's always a but
) his might
be a bit overboard. With bare walls, I probably would have left it alone or just used several diffusers, but not use so much absorption behind them. Bass traps along side are OK. For all intents, he's reflected or deliberately killing a lot of the rear wave. But he has a hard floor, so it may have helped him. If you have large enough space, no nearby side walls & have carpeted floor, I can't see the need for that much treatment. I never did until forced to by my situation. I'm also experimenting with 2 - 6" thick bass traps behind mine, and truthfully, I think they sound worse with them. So you can have too much.
I also found a pic showing what I think is considered use of treatments near tight corners. Mine is the 2nd one with the plasma to give you another perspective.