Yeah, I've heard that "true" wedges are very rare. I've got a matching pair of Joseph Rodgers straights that I'd class as wedges - they have a small amount of concavity. The bevel that developed on these when I first honed them was 1-2mm wide, at a rough guess. That's a fair bit more metal removal than is required on a full hollow.

I've found honing them is more time consuming, for sure. I might be wrong about this, but I decided that it's better to sneak up on the sharpness with a wedge - overhoning and breaking off a wire-edge means more work than on a hollow (not that I go for overhoning on a hollow either... ). Once they are there, wedges give a beautiful shave, IMHO.

James.