I hate this arguement. It is all symantics. Basically our forefathers were not specific enough when they were naming these tricks. Dont stress over it. It isnt something to argue about. However, it was explained to me in a pretty cool and understandable way. I didnt get it until I rode for a while, then it became logical to me. Imagine youself lying on the floor. Now "rolling" from side to side is the movement of a roll. Now if you were to "flip" forward or backwards it is the movement of a flip. So, Ill probably get totally flamed for this, In my opinion a HS front roll is an S-Bend. Well, what happens on a mexican roll where your moving backwards but doing a front flip like an inward on a diving board? Inward flips have never been something discussed in wakeboarding, but it has been named a mexican backroll, so let it stick.
Just my .02