I love me tuxies.
I personally think they need to look like they are wearing tuxes to be called that as a descriptive wording. Some that people call tuxedo cats (like i've seen on petfinder) are really not IMHO. If they have more white than black on the head and shoulder it looks like they are wearing their "shirt" over their heads.
Very sloppy tux wearing kitties.
Just as a response to those that show their cats, I can understand the peevishness. I also understand that they are not a breed, but it is a way to describe the pattern of their coat. Not b&w striping, not b&w circles, but b&w tuxedo looking. If my cat were to be lost I would gladly give them any description that would help. Being a bi-color b&w would not narrow the field very much being that their are TONS of b&w cats out there. But if I tell people they are wearing a suit that narrows the field a bit.
The photo of the tux with red bowtie is soooooo super adorable.