If you play WoW and pvp, you know that a lot of people are complaining that burst dmg is the number 1 thing that "needs to be fixed". 65% of complaints are about how in group pvp, the fact that people can die before a 1-1.5 second heal cast goes off is common. The group pvp becomes, who can burst each other down first. Blizzard has responded with "Burst is not a problem..." Claiming that it wasn't possibly to kill someone that fast.
This happened less than three days ago at the Major League Gaming finals in Columbus.