I think he's trying to say that it drives like nothing else in a positive way. In other words, It drives very easily even at speed and even at corners. We may consider that a supercar.
On the other hand. The Golf W12, (as said by Jeremy Clarkson at Top Gear) "it will not go round corners". YouTube - VW Golf W12 650cv Bi Turbo in TopGear
Even if that thing could beat many other cars at a straight line, I think many of us here will still not consider the golf w12 a supercar.