For a supercar, being fast and grippy isn't enough, is it? A simple ability to cover the ground rapidly is no longer a USP. You can get that in a saloon. We don't hear anyone accusing four_doors like the M5 or E63 AMG of being ‘a bit slow from A to B'.
It would be easy to dismiss the single-seat BAC Mono as another garage-build special, another ‘racecar for the road' from a British start-up company, with a supercar-crushing power-to-weight ratio and a chassis constructed from bits of old washing machine and blind hope.