It's interesting to note that Brooks previously produced a leather saddle with the same design concepts as the Flite - light weight, exposed saddle rails, cut-away design. It was called the Champion Swallow and was available in 1930. That's right, 73 years ago.
My point is not to nit-pick Dan's article. I just think it's interesting that most "revolutionary" bicycle designs are actually very old - or at least a play off something very old.
If you like this type of bicycle minutia, the Rivendell Reader is a good read.