There is certainly a difference, IMHO, but that is coming from someone that has drank pop with “real” sugar my entire life. The only time that I know of I drank a US made carbonated drink with HFCS (that didn’t have liquor mixed in) I noticed the difference instantly.
I know, I know, anecdotes are not actual data, but it was obvious to me.
I tried Coke with Cane Sugar in Canada. I… didn’t like it as well as HFCS, but that may be more of a factor of me being used to the one, not the other.
I wonder how this “mouth-feel” thing is explained chemically… ?
I’ve heard or read, can’t find any cite now, that the whole Coke-New Coke-Classic Coke thing was just Coca Cola’s way of diverting attention from its shift from cane sugar to the cheaper corn syrup.
Emperor’s clothes, mostly.
That would be correct. 
Being under thirty, that’s probably why I felt the way I do. My sister, who’s sixteen, was drinking one of the bottles last night and asked if I was going to buy more. I said no, one reason being that it tasted the same as ‘regular’ coke, but were more expensive (the other being that I don’t want to stock up on soda). She didn’t disagree with my opinion on taste, but said she liked the novelty of the bottle.
I’d heard that, but I’d also heard that Coke rolled out the HFCS before the switch.
I don’t see why a 5% difference would not be detectable, at least by some. Combine that with the fact that likely not all the sucrose would be converted, and you might have a significant difference for those who are trying to taste it.
I really, really want to try it, and do it right with having it unmarked, but I don’t know how to get a hold of a caffeine-free cane-sugar variety, and I can’t have caffeine.
Snopes says the sweetener switch started in 1980, and cane sugar had already been completely phased out by the time new coke was released in 1985.