Interesting — I grew up with PAL and I don’t notice any difference in speed. I would have thought that the difference in audio pitch would be more noticeable, but I’ve never noticed it either.
Do rock bands in Europe and the Uk tune to 440 or 444hz? I know some symphonies in Europe still use the 444hz or varients like the Baroque tuning. Its a subtle thing but one American band that uses a slight tuning twist is The Red Hot Chili Peppers on Scartissue.