Sorry 'bout that -you just happen to sign your post with the same name that I have -I just momentarily forgot that other cultures have other gender-specific names...
Worldwide, it's probably about 50/50. Here in the states, most people will default to assuming female. Outside, most go with male. One place I worked had one of each and I was always getting is phone calls because he pronounced it completely different.
I don't get it: of those several places I can only think of FacePlace and the likes...
There used to be a couple of places I'd read in a horrified sort of way. The ones I see lately are about celebrities who are lousy tippers.