How can you say it's not a road car hcrv? I have seen them being driven on the road.
Some Porsche 917s are on the road as well, but that hardly makes them a production car.
It is a road car end of story, just because you say otherwise doesn't make it so, it's obvious you're not biased.

It can be driven anywhere in Europe, fully MOT'd and insured and on road fuel and road tires. Get over it. It is built and sold as a track car that you can drive to the track (like the Atom, which is also a road car) and drive home again, the porker you mentioned is an out and out racing car that can be made road legal, there is a slight difference.
I would agree with RR that they probably don't make enough for it to be considered a production car. But there is a difference between production car and road car, you just twisted what I said above.
But as I said before, 'ring times don't really matter, I don't understand why people get so worked up about them. I doubt I will ever drive or even know someone that owns a Radical, GT2, Gumpert etc. etc.