yeah i saw a few traction issues
mind you, a few people were running like heavy 17 and 18 inch rims with not that much rubber
reducing tyre mass, and increasing sidewall height for the drags is a good idea - firstly reducing sprung mass (less tyre mass = less inertia = quicker of the line) and secondly allowing the rim to 'spin' in the tyre and allowing more grip (sidewall wrinkle on drag cars)
its funny, ive heard convo's between guys in their 'fully sic commodores' complaining that there running shit times, and ive asked them what there setup is. the answer: full stereo system, big 17,18,19 inch heavy chromies, tight coilover suspension systems. HELLOOOO, thats ur problem right there!!!