I drove the 350 several times at the dealer before deciding to buy. Trust me i drove it hard as hell n nasty with big turns and stuff. I never noticed anything weird or less powerful about the drive. WHat is it that trigger VDIM so i know that it is on? On the contrary at Taste of Lexus in miami it was raining so when i drove the 350 there in the rain n did turns it was consistanly on cuz i cudnt gun it and i just knew it was consistantly on cuz i cudnt do nothing with the car basically...so in any case...is it always on or do we as drivers do actions to trigger it?