Stonebreaker et al research supports traditional

There has been a recent study by Michael Stonebreaker and company comparing a "traditional"
parallel SQL database with Map-Reduce over a 100 server farm and finding the SQL version was
much more efficient. Now M.S. is not exactly unbiased here, but still it was interesting. You have to
be ACM member right now I think, but look at ACM Transactions shortly I believe.