The bass hump is bizarre, not supported by Axiom's own anechoic measurements or double-blind listening tests, which I've done on the M60 v3. BB's measurements are in-room, which are fraught with problems, so the measured bass hump is an artifact of Brent's room and speaker placement.
As to the brightness comment, I also find that peculiar; on the other hand, Sound & Vision magazine does not do double-blind or blind listening tests, so psychological bias will always play a huge role.
I've known Brent Butterworth, the reviewer, for 20 years. Reading other speaker reviews of his, it seems he's impressed by glitzy design. Or perhaps he was bending over backwards to show he wasn't biased by our collegial friendship. Who the hell knows? I can't figure it out.
Axiom Resident Expert