Ah, but I just picked up a 9-month old gray and white tabby tom who never stops talking. And of my two golden-red tabbies, one is almost cream-colored and the stripes are barely hinted at and the other is a strong, powerful male with beautiful clearly-deliniated stripes in a stunning red-gold. The female is small, small-boned, and compact, while the male is long, tall, thick-legged, and big-boned, and they both talk when spoken to, when the enter the house after being outside, or, in the case of the female, when she wants to tell me that the water dish is empty (I call her the water-cat because of that). The male is aggressive but totally sweet, and the female is shy and totally sweet. Different body shapes? They both exhibit no fear of water, come to think of it -- Neptune (the male) got his name from falling into everything wet he could find when he was younger -- the mop water (which was dangerous, since I mop with things like chlorine and amonia). He falls into the bathtub (where the washingmachine water goes) quite regularly, dashes through the sprinkler for fun, fell into the toilet twice when he was a kitten, and still likes to play in any water I am dumb enough to leave open for him. Kitty (she was named before I got her) doesn't mind water, and sometimes drinks from her paw, but her main talent is to come, day or night, to pester me to replenish the water dishes. She is not happy until I do both the outdoor and indoor ones.
My other tabbies of various combinations of gray, black, and white are occasional talkers -- they will always talk to me if I speak to them when the come in, as: Oh, hi, Yoda. Tired of teasing the dogs?
But this new cat, who is undiluted tabby, with dark charcoal, smoke-gray, and snow-white underparts talks and talks and talks, and gets all joyful when I talk back.
I think color and temperament cannot be the only links. I think that the original ancestral breeding is also important, and that could include all kinds of factors (body shape, bone size, hair length, tail length, size and set of eyes and ears, mouth size -- everything that differentiates one cat breed from another). I do wish someone had done some serious DNA tests on the subject, but I suppose at the moment the scientists are all too involved in proving that all Europeans came from 13 males back before the last great ice age...and that all human-kind regardless of color and shape are all intimately related at the level of DNA. Maybe we should organize our own research study!!!