I don't even think it's that.
I think ID speakers just strive for more accuracy (IE Ascend/Salk/Philharmonic/Soundfield/Audiokinesis etc) while B&M speakers go for instant subjective impressions (B&W, Klipsch, even Infinity) on the showroom floor. So for B&M, it's all about aesthetics and a sound character. for ID it's all about sound accuracy and measurements