With the foregoing as background, it's fascinating to look at the cloud computing Magic Quadrants for 2011 and 2012. The thing that immediately stands out is the different position Amazon Web Services occupies in the two years.
In 2011, AWS is rated quite highly for "completeness of vision" but is bunched with several other providers for "ability to execute." In 2012, by contrast, AWS stands alone, having put significant white space between itself and its competition. Non-AWS cloud providers are huddled down in the least-desirable lower-left corner-in the MQ, but barely. AWS sits alone, near the most-desirable upper-right corner. The white space between it and its fellow MQ members is striking.
One can speculate as to why Gartner chose to put AWS so far ahead of its fellow cloud providers: