We've not heard of anything in Track Mode improving acceleration performance. We've read that the accelerator response profile may be different, but since you'll be pedal to metal, I doubt that would make any difference at all. If it did improve 0-60 times, Elon would have posted about it instantly.
But enough people read "Track" mode and think that their 0-60 times will improve that I think you should do a series of comparative runs and post the time slips to settle it once and for all!