This despite the fact that the word record carries with it no explicit reference to the medium. Folks generally explicitly say LP or vinyl when referring to a 33-1/3 rpm recording.

I beg to differ. Most people I know refer to a 45rpm vinyl as a record, a 33 1/3 rpm as an album or LP. I have never heard anyone use the word vinyl except on U.S. television. Here there is a distinct difference in pronunciation. When pronounce wreck-urd it is explicit to the medium. When pronounce ree-cord it is not.