I've seen plenty escape it. Hell, I've escaped it plenty of times. Sure, if you hit someone point blank with BOTH 'nades then yes... chances are they're going to be quite dead. But being almost hit point blank with a vortex grenade tends to do that by itself. I just fail to see why people fume over this. Many / Most grenades will one-shot you by themselves. This requires 2 separate charges, and still isn't a guaranteed kill. With my Titan or Warlock I could hit someone with a fusion grenade and kill 1 or 2 people, then still have my melee charge to punch the guy standing next to me.