My friend told me today that Road & Track got 4.3 sec in the new Z 0-60. Said the GM claim of 3.9 was bogus. I thought for GM to publish 3.9, it had to be documented ? I remember reading somewhere that GM got 3.9 by not using the clutch, which was quite punishing to the transmission. Is that possible ? What's the skinny here, can a stock 02 get 0-60 in less that 4 sec.? Can you go balls out thru the gears without using the clutch ?