It wasn't me saying that he did say that.He doesn't say that “measurements don't matter”, he clearly says they don't tell you everything of how a speaker sounds and how it performs as a studio tool.
What I see is a salesman concentrating on the areas that he's likely to make a sale on and playing down the area where his product is inferior to some of the competition.
Not surprising, it's his job after all and he's correct that there's more to making the selection than just frequency response. Actually, I'm inclined to agree with you that low distortion is more important (assuming FR is within acceptable limits).