I'm looking for a little enlightenment, or perhaps to generate some discussion. In reading Bryan's reviews, a lot of the lenses that have "many" aperture blades (8 blades for example in the 200 f/2 IS L) suggest that the number of aperture blades contributes to the bokeh quality. So here's my question: don't most of us tend to evaluate the blur quality at wide-open, maximum aperture? And as a result, isn't the aperture blade count irrelevant at that point, as the blades are now "in" the aperture housing? Certainly it'd be disappointing if the blur quality changed drastically as soon as we stop down 1/3rd of a stop, but...