'BC,
Yes, you (we) have/had them in PA, OH, WV. They can salvage a slow day in the marsh as they seem to always be willing to decoy without hesitation and are always around when those greenheads seem to be MIA. There is an issue in preparing them for the table, as has been noted. I shot one at a prairie pothole out here some years back after nothing came in and the stupid thing kept coming into my decoys. I field dressed it, and that one smelled so bad, I just had to leave it. That spot is well populated by coyotes, and during hunting season, they eat well on the deer, pheasant, and duck gut piles. I came back a few days later to hunt pheasants, and my coot was still there-not even the coyotes would eat it.
I've had luck in the past soaking the meat in butter milk overnight. I learned this from several old time watermen on Maryland's eastern shore way back in my more formative years. This can work for most skanky ducks (bluebills, for example, if they haven't been eating their veggies)