By, you might be surprised. As I've reported several times, in my setup the M22s have significantly lower, but still usable, response around 40Hz. You might try listening to 40Hz on a test-tone CD or other source of tones. In your smaller room with closer spacing to the wall it's entirely possible that room gain would result in an increased 40Hz level. For example, if your longest room dimension is 12', one aspect of room gain begins at 565Hz/12=47Hz.
The Audyssey measurement I got suggested 60Hz, but nevertheless I manually raised it to 80Hz to give my EP500 more to do and the M22s less.
