Well, vinyl is indeed "warmer audio" in a sense, in that it is more compressed and has higher saturation (due to the format properties), both of which can sound naturally pleasant. (It's also more tactile, which adds to the warmness psychologically).

CDs didn't have that great dynamic range or noise floor anyway (they were copied from -usually- 2inch master tapes, so tapes were still involved, and thus noise). 24bit/48 or 96Hz, on the other hand, now we're talking (but still most people wouldn't hear much of a difference in most mixed music, and in the majority of cheap headphones/speakers).