Many years ago I went to see two friends in Coventry about building me a 'retro' frame using the existing dropouts in my Pug.
You see, I bought the Pug when I was fifteen and my LBS man assessed I had another two inches to grow. The Pug was sized to the French fit and it has always been 2cm too big for me.
I had a crazy notion to get LA Cycles to reproduce the frame to my ideal size.
After a discussion, it was agreed that the 2cm only makes the standover height a bit tight, and the 74 deg seat tube angle means the saddle is a little rear of centre. ie, sod all advantage in having a custom £550 frame built.
If 2cm and 1 deg makes such a difference to bike performance, I'm sure they would have happily taken my £550.