Yeah that was good stuff. Here's all the results for easier viewing/analysis:
Time Attack
ZR1
TS 271.04 kph
CS 135.21 kph
Lap 1:53.964
F430F1
TS 259.48 kph
CS 133.27 kph
Lap 1:54.436
GT2RS
TS 276.49 kph
CS 128.53 kph
Lap 1:51.802
GT-R
TS 270.04 kph
CS 126.44 kph
Lap 1:52.937
LFA
TS 263.50 kph
CS 134.10 kph
Lap 1:55.342
2nd Gear, Rolling 1.2km Battle
GT-R vs LFA
256.93 vs 248.77
ZR1 vs GT2RS
255.86 vs 249.55
GT-R vs ZR1
255.62 vs 260.37
3 Lap Race
1st GT-R ..........BL 1:53.633 (L2)
2nd GT2RS ......BL 1:55.155 (L2)
3rd LFA ...........BL 1:55.190 (L2)
4th ZR1 ...........BL 1:56.284 (L3)
5th F430F1 .......BL 1:55.401 (L3)
Don't know what happened to the ZR1 in the race as the only way it didn't finish last was to out drag the F430 across the S/F line on the last lap. Both were wellll back of the other 3 cars.
And if that was a "tuned" F430, what was it tuned to do exactly?

I can understand it's lower top speed, but I'd would expect its cornering speed to be much higher than the other competitors. In the race is was a complete non-factor.
The GT-R is simply a rampaging beast off the line and all its electronic trickery and brainy differentials clearly are capable of making up for its portly weight. The added 100hp or so compared to the prior model doesn't hurt either naturally. I love how the driver knew how much he was going to destroy the F430 ahead off the line that he began his evasive maneuver even before the car launched

.
Likewise the GT2RS also proves yet again the ability of a well designed AWD system to compensate, quite well, for the added mass 
. GTR2RS is just fast

. Watching the effects of the turbo boost via the tach on this car under acceleration was rather impressive.
LFA gets my vote for best interior sound, but gotta admit I thought it was gonna be faster than it was.