Sorry, Miss Nancy, but "speed" (= efficiency) is a major factor if you want to evaluate quality.

A car that can go 100mph for half the mpg than a car that can go 110mph is IMVHO the "better" car.

So I think the AVERAGE Poser user would be better off with more accurate and optimized meshes that render also faster, than trying to sqeeze out the last ounce of realism at any cost.