It works with ad-hoc wifi with no other infrastructure requirement or Internet connection, just the same as AirDrop. What more do you require to meet your definition of "disparate peer to peer wireless mesh"?
Your statement may be tongue-in-cheek, but this sort of attitude is why we don't have this deployed on devices en-masse. Non-technical users want something that just works with one tap, not something that requires them to manually set up an ad-hoc WiFi network every time they want to use it.
My original point was simply that the technology exists, and pointing out that there isn't a decent client doesn't negate my point.
It is unfortunate that our ecosystem is arranged such that a decent client hasn't happened.