Isn't a 5 sec gap what you call getting spanked in this technical track?  Like I said it's outrageous.
GT-R: 1:56:90
911 Turbo:  2:02:01
Z06:  2:02:02
Many people are calling foul on this test, there's no way a GT-R can do this. 
If R/T gets more rants about this evaluation, I predict they will do a rematch, they may choose a track that will probably help 911 turbo / Z06 narrow that HUGE 5 sec gap.  Laguna Seca perhaps?
Well, that's just it.  It's a track and yes a 5 second gap is big.  Then again you could find a track that suits the Corvette better, or the Porsche, but it's just ONE track result.  
But my point is comparing the test track results with the general head-to-head comparison which gives you a much bigger over all picture.  When you look at 0-60, 0-100, quarter mile, skidpad, braking, etc...they all very close to each other.