I believe it really is Dolly slowed down, although I guess it would be quite easily confirmed by someone who has the original and can slow it down. Best results with the original 45, of course!
I think DP's great...yes she has not been taken seriously enough in Europe - when I was growing up in the UK I don't think I ever heard her mentioned if the subject wasn't large breasts. She was seen as a bimbo with a singing career, which of course could not be farther from the truth. It was only when I got older that I realized what an incredible singer she is, and such a warm genial person to boot. I always thought she was a fine ambassador for America.
And what a voice - I never liked "I Will Always Love You" until I heard the original Dolly Parton version (I believe the movie clip with her singing it to Burt Reynolds is on YouTube). So much more genuine and soulful than the Whitney Houston version.