I took Marc Hallam's advice, and moved my M22's almost 2 feet from the wall behind, but unfortunately they are only about 6 feet apart. The toe in is just slight. Let me just say, the speakers sound far better now that they are no longer a couple inches from the back wall!
The soundstage is far more open, both horizontally and vertically. They sound far less boxed in. I never realized how much better they could sound, but now I do!
I suggest to everyone with M22's to take Marc's advice and place them 2-3 feet from the rear wall, 8-12 feet apart, and give them a slight toe in.