Had to chime in here.
Based soley on my experience, in the quarter, the STi has the advantage. Been beat by only 1 LS1 (tubbed) and 1 WS6 (missed my 2nd-3rd shift) out of at least a dozen races.
One slight correction...race from a roll is a measure of the HP/weight ratio, not just HP. Good case in point is a Lightning...a tub at the top end, but more HP than than an LS1.
BTW...not a hater, just a realist. My stock Cuda doesn't like playing second fiddle in the quarter to my STi any more than my friends WS6 and 02 Cobra.
Last comment...although I have ran at the strip with my STi, that is not it's forte. Take it to a road course or rally...then have some fun. It takes at least a Z06 to beat it there...and yes, that is by experience also.
Anyone going to FATT May 21 at Summit Point Raceway? See you there...just be sure to wave that left arm out when you see me in your rear view mirror