It's a valid point indeed. And I agree with you 100% unless you're implying that the 'warm' sound he prefers out of the Energy's is inferior to the accurate M22's. Because while there is no denying the fact that the M22's are probably giving the more faithful playback of the recordings, it's up to him whether he prefers a faithful reproduction or a colored version.
It seems to me that he's aware that the 'warm' in 'big, dumb, warm speakers' refers to the fact that they have a bloated bass response curve. But even though he knows they aren't the more detailed and accurate speaker of the group, he prefers the characteristics of the flawed speaker over the M22's anyway.
I suppose to his ear, the flat response curve of the Axiom is its 'flaw'.