Fender's been doing it for a while now, though you can still get a "vintage" radius....but you get 9", not the real vintage 7.25" monstrosity. I think you can get the real one now too if you want it. Gibson is a straight 12" radius. PRS is a straight 10" radius (on a 25" scale). I believe Taylor is a straight 15" radius. I forget what Martin does. I refretted an OM a year or two ago, and I seem to recall it being very flat....16" maybe. A lot of the Fender style builders use, or at least offer, a conical radius, but most others tend to use a straight radius.