I'm afraid the Kodak rep got it wrong. I have a spool of 100D (code 5285, off the top of my head) and it definitely does not have a remjet backing. Not only have I seen the film, but I've used it and my lab (The Lighthouse Lab in Sydney) has processed it for me with no ill effects.
I remember when I was researching before I bought it that I found a reference in Kodak literature to the effect that it had no remjet, but I don't have time to try and find it again...