I'm fairly certain on my interpretation. Granted, there is some confusion regarding the spell, usually in regards to if the meteors "travel through" an enemy and deal 24d6 no save damage to all in a line (which it doesn't).
I've been compiling spells that suffer from such problems. I'll also put in a plug for my thread on the issues:
http://enworld.cyberstreet.com/showthread.php?s=&threadid=24220
Here's what I have on meteor swarm....
Meteor Swarm
Problems: Underpowered, Vague
· Underpowered: As the most powerful “blasting” spell, meteor swarm lacks in the massive damage department. It is a good damage dealer to a single creature (see below), but when one of the “patterns” is used, the damage is typically not as good as a fireball or delayed blast fireball (except for a slightly higher DC).
· Vague: A common misconception of meteor swarm is it will travel in a straight line, damaging everything in its path for 24d6 damage without a saving throw. This is only partially true. The spell “detonates” in the same manner as a fireball when it strikes a creature. The spell is unclear how it detonates, which most likely means it does not detonate at all and only damages a single creature for 24d6 without a save. There is an important “if” in meteor swarm’s description that gives it the fireball quality (explodes/damages on impact).
Enjoy!