There is no point unless you want to burn more gas then the auto already does. Car has enough low end that it can pull its own and dones't need to shift everytime you hit the gas a little.
Even at the track there is no point, car will shift accordingly when on WOT. Putting it in 3rd at a stop, it will still launch in 1st... and if you redline 3rd it won't just bounce on the rev limiter, it will shift.
2003 Corvette Z06 - MGW shifter, Corsa X pipe, Corsa Xtreme exhaust, Texas Speed long tubes w/o cats, PowerStop rotors/pads, Conti DWS tires, C6Z51 F&R sways, C5R headlights, tuned
04 GTO - sold