Top gears review is old, since then car technology has moved on so much. The Enzo is a dog as a track car, watch some of its videos on youtube and you can see it is litterally all over the place, it is a road car.
Since then there have been massive leaps in technology from cars like the Nissan GT-R, Bugatti Veyron, Ferrari 458 and more recently the Mclaren MP4-12c.
The Veyron, 458 and Mclaren Mp4 would run circles around the Enzo, and I do believe on the Nurburging the much heavier and far lower powered 2011 GT-R is faster.
The game got the Enzo right, if I drive the stock Enzo without lawnmower curb cutting around Nordschleife on sports hard tyres I will average laptimes in the range of 7:15-7:25, pretty much the same as the real life car.
My times around the top gear test track with the Enzo on sports softs are identical to the times I make with the Ferrari 458 on sports softs, very similar to the real life situation.
Basically, people expect that their driving skills in GT5 are equal to Michael Schumacher and if they cannot drive a car then it is the cars fault. That and they have no real idea of how an Enzo in the real world should drive, if you do your homework you will see that it really isn't such a great track car.