Does anyone else think that Reddit's usage of EBS might be the culprit?

Looking at their past outage response:

http://blog.reddit.com/2010/01/why-did-we-take-reddit-down-f...

Money quote: "In response, we started upgrading some of our databases to use a software RAID of EBS disks, which gives drastically increased performance (at a higher cost of course)."

RAIDing EBS disks seems like a really really BAD idea. There is a non-trivial failure rate of any single EBS disk, and if you RAID them together, your failure rate of the RAID will consequently increase. Am I understanding that correctly?

If they fix that, could that be a 'silver bullet' to fix these outages?