Yeah. If you can get 1d4+1 elementals that deal 15d6 damage with a single round's actions, that's (on average) 3.5. I'm gonna round down to make my maths nicer. 3 elementals, 15d6 damage each. 45d6 damage. With double-repeat for teh lulz. (You get the effects this round, next round, and the round after) This is a minimum for what will happen 75% of the time. And we're using a 8th level druid spell for it.
Now, it is possible to point out that the spell will have a lower save. Which means that we get 22.5d6 more often than we'd like. However, this is made up for by multiple factors:
1) The triple repeat, which can only be avoided by taking out all of the elementals. If they manage to only take out one of them, they still take 15d6 next round if they make all saves, totalling 37.5d6. Which is still more than meteor swarm.
2) The leftover bodies. 3 Huge elementals will be clogging up the area. Even without Augment Summoning and the like, this gives over 500 hit points. Additionally, each elemental fills up a 3x3 area, meaning 27 squares that opponents can't move through.