My level 60 ret paladin twink from original WoTLK had the same exact amount of power so you can in no way, shape or form pretend this is new, infact, i would have to say it had even more power as I could kill fresh level 80s on it back to back as could some other level 60 ret paladin twinks back in the day.
So a shammy that can do this in SoD is still a massive downgrade compared to what we have seen before from other classes back in the past.