So will it be just as fast paced as the low level videos? I've come to find low level dueling in WoW is much more fast paced but also takes skill. And with the PvP are their rewards for moving up? I couldn't see PvP/PvE gear in D3....but it would only make sense for the arena to work and/or to actually last some years ahead.
I do however like extended battles as long as your fighting to stay alive or trying to obtain some armor/weapon/etc. But it's when the system seems bugged that neither your HP is moving and the dmg is too small to make a huge difference. I.E. Pally Tank v Pally Tank or Pally Tank vs Blood DK.
Last but not least, will there be a "Grandmasters" in D3, I believe that would be amazing. Moving up is addicting enough :P but top 2-10% is epic.