During my test drive of the VT, I tried a dead stop take off with TC off. The take off is noticeably faster, however you WILL get tire squeal with the OEM tires. It will be helpful to get a stickier set of tires when doing this. Test drive was with the A/T.
I have noticed a quicker and smoother acceleration with the TC off. I have, chirped my tires in first and second with TC on and off. I do try to turn it off whenever i am in the car. I mainly plan to use it the Chicago winter.