I think that J. was relaying the comment of another driver- and one who had also driven an Enzo at VIR- not making a comment on his own. Why is that lame? Apparently another person with access to both cars thought enough of the SLC to make the unsolicited comment.
Is it too much to believe that a hand-built car could seriously challenge the Enzo at the track? With adequate power, a sorted car, and a capable driver, Ultimas have already shown that they can beat even the FXX variant on the track, as RX Heven mentions above. I don't think the Ultima, with a chassis that is significantly less rigid than the SLC, and an overall design that is already decades old, would be an overdog in a race with an equally prepared and sorted SLC. It follows that a well-built, sorted and well-driven SLC could indeed lap faster than an Enzo, especially considering that the Enzo is considerably heavier, and considering that the SLC can be made to have much more power than the Enzo.
Your SLC has a great specification, but have you actually run the car competitively yet? I don't mean burnouts on the street, but serious time at a real track. If you haven't done that yet, and actually developed the car on the track, perhaps you would be surprised at the results when someone else actually does that. If you have, please share the details with the rest of us!
In the meantime, everyone, regardless of whether they have a dog in the fight or not, should welcome feedback from those who are actually running their cars at the track. Those pioneers blaze the way for the rest of us to get the most from these great cars.
I was actually at VIR for a day with J. and his father when they began shaking down the car. What I saw was a car with great potential. They began with the prudent goal of becoming acclimated to the car, and working up to speed. This is a reasonable approach, and a mature one. More speed will come when the new engine is broken in, when the car is sorted, and when they have more seat time in a very fast car. All that will make what is already a fast car right off the trailer now, into a formidably fast car later.
Eventually we will be able to judge whether the comparison to an Enzo is actually "lame"-- or not. In the meantime, I look forward to the contributions of everyone who is interested in these cars, especially those who are actually running them at the track.