Just a damned minute--The supposedly universal American practice of voicing unvoiced dental consonants, making "d"s of "t"s, is a fucking calumnious Anglophile Fiction, and is certainly not a Feature of the Standard American English that I speak and espouse:

I, for one, never have the least difficulty in distinguishing "water" from "wadder." I admit that I do not hear such a distinction in the odious New York dialect; but I deny that that hateful parlance of nauseous Jewish girls is, in my same sense, American. Or Standard.