Ah right.
Well, personally, I have a 40" Sony LCD. It's only a U series, so the cheap end of the Sony range but I can't say I have any problem with smearing on it .... and I watch plenty sport.
Watched the F1 race (in crappy SD .... come on F1 people! Your sport is the pinnacle of technological development yet I'm still watching it in SD! .... next year hopefully.) and had no problems with that and I doubt there is a much faster moving sport out there.
Ball motion in golf, tennis and football is also fine.
If my low end U series can manage it, the high end Sony LCD's, Panasonic and Pioneer plasmas must look absolutely exceptional!