That's a question that's difficult to answer, particularly if one doesn't frequent both the Civ3 and Civ4 forums. I suspect that the answer is "no". There certainly are people who like III and hate IV. But my guess is that if for no other reason than the higher population of the IV forums, more people like IV but hate V.
Actually, even though I'm mainly in the III forums, I'd consider myself as someone who likes IV but dislikes V. I used to dislike IV as well, but with both expansions I now think it's actually a fairly good game. Vanilla IV just wasn't as good as Civ3 Conquests IMO.
Off-Topic: I like TomYo689's sig, especially since it was larger than the sum of the content in this thread when he posted. I'm curious what you think the standard signature on a generic forum looks like?