I would like to think that the Hunter, Spitfire and all the other types mentioned above are all good examples of this theory.
Yet, other aircraft seem to disprove it, such as Shorts Belfast and Fokker triplane (yes I did mention the Belsow, as I think it looked like a winner).
One aircraft I would like others opinions on is the B1 in any of it's forms. I think it looks sleek, and to me looks like it should be in a similar speed range to Concorde. Is this so, as it constantly seems to have been left in the side lines during it's career, even after being revived.