Somehow, I have missed that point when NAS is considered more cutting edge technology than SAN. When did that happen? I must admit that I don't have experience with NAS so far and look at it from a my own corner.
In fact, the IBM guys advised them to take SAN for RAC, not NAS, but the custumer insisted on "the latest, the best, the most expensive, cutting edge technology". The same is for the Oracle release - they take EE and never ask if Standard Edition is fine for them.
-- Best regards, Alex Gorbachev