IMO, it might have a tad bit to do with it. I like to think of it like this: The power of suggestion and marketing strategy employed by the good folks at Wilson was on full tilt for the K90 and K series in general. Remember these ads?: Couple that with the fact that Federer was so utterly successful with this PJ, and I'm not talking about just collecting GS after GS, but achieving record-breaking and milestone-achieving ones, such as the elusive French, the record-breaking 14th, and the epic 5th setters at Wimbledon (with Nadal and Roddick), you have a racket that has been burned in the image of diehard and casual tennis fans alike. This is very influential, dare I say powerful, in affecting one's perception of the very subject at issue: the racket. Then again, what do I know, I'm not a pyschologist nor an advertising exec! All I know is that I like the K90 PJ the best.