I just happened to catch that segment as well. As a pretty avid Factory Five owner and builder, I didn't like it much either. But several observations from my side. (1) The guy is a car snob. I've always had that impression. They deal with very high end cars, high end restorations, original Cobras, etc. and clearly have customers with more money than they know what to do with. (2) He was doing the usual sales routine of talking down what the guy wanted to sell or trade. (3) He clearly is misinformed. Suggesting a Superformance is more authentic than a "restomod" Factory Five is just wrong. Check the frame and tell me which one is closer. (4) Each replica brand has their take on the body shape. Some closer to the originals than others for sure. The car on the show looked like an earlier Mk2 or Mk3. Hopefully he would agree the Mk4 is a little closer.
But maybe the bigger point, and I suspect even the most loyal customers would agree, is that Factory Five has really improved their product over the past 20 years. Some of the very early versions and all out donor builds are really nothing like the products most builders are turning out of their workshop today. But some still remember those days, and still apply it to today's product. I saw some of that in his comments. I've personally experienced exactly that opinion from several people over the past few years.
I'll be interested to see if he responds to the email.