I got a chance to take my car for a drive today with my new PSS in stock sizes. It was about 52 degrees out and getting dark out. They still pick up rocks but not near as bad as the GY's. Ok first gear still out of the question but second gear was fine after getting a few miles on them and a little heat from just driving. I was able to do second gear rolls from 30-60 and the tires hels almost everytime. Third gear you don't even have to worry about if it will hold. They seem to ride nicer and produce less road noise and seem to respond very good to steering inputs. I was out a few days ago with the GY's and could not get first or second gear to hold at all but third gear would hold if the road wasn't bumpy. So all in all they are a improvement over the GY's for normal street driving and even some playing around. I would guess the GY's are just as good or better when used in warmer temps and with a good amount of heat in them. I never had any problems with the GY's other then traction in cooler weather and all the MF'n rocks they picked up.