Yes, I have been to poultry shows. I have seen live birds. It's just a fault with bantam wyandottes that doesn't seem to be of major concern that does drive ME nuts. I've talked to breeders that like this--again I have no problem w/anyone breeding whatever they like. When you read the bantam standard, the tails are a definite weakness. as is pointed out by you the heads aren't blocky as the "whites" are plus the legs are too long and not thick enough. Again I've seen whites that are almost perfect form while partridge have areas to breed out.
See page 2 picture and ask "do my bantam wyandottes have this form? I have been around chickens for 45+ years, know the standard in breeds that interest me, & wish partridge had the "form" of the whites of 10 years ago. My hens show better form than my roosters do but I still wish they were better. Mine are no better than others I've seen and not much worse either. I don't breed for show (no time, interest, etc) but I do breed for standard--no I don't sell either.
Not to make anyone upset, but I'd love to see some partridge that had great wyandotte form.