I'd say for Amazon having so much 'completeness of vision' they are pretty low on the ability to execute on Gartner's crappy chart.<p>Seriously, AWS is <i>crushing</i> it: <a href="http://venturebeat.com/2010/08/03/amazon-web-services-generating-an-estimated-500m-in-revenue-thanks-in-part-to-growth-of-social-games/" rel="nofollow">http://venturebeat.com/2010/08/03/amazon-web-services-genera...</a>
I very much enjoyed this post. Personally I don't particularly rate Gartner's 'Magic Quadrant' stuff but this non-Gartner blog post was a useful read for gaining a better understanding of what some of the real differences are between different IaaS providers.