I've done maybe 20 runs that have been sub 5.3; the key is keeping out of ASR. I do my runs thus: In "D", I power-brake to about 1,500 RPM, then when I release the brake I don't release it all the way, thereby tripping the rear brake light switch...this often tricks ASR
I'm very pleased with the performance of my car...I only wish it weighed a little less