Microsoft Azure overtakes Amazon's cloud in performance test

Azure's cloud is faster at uploading and downloading files to the cloud, Amazon still more scalable, storage provider Nasuni finds... Nasuni uses public cloud resources in its enterprise storage offering, so each year the company conducts a series of rigorous tests on the top CSPs' clouds in an effort to see which companies offer the best performing, most reliable infrastructure. Last year, Amazon Web Services' cloud came out on top, but this year Microsoft Azure outperformed AWS in performance and reliability measures. AWS is still better at handling extra-large storage volumes, while Nasuni found that the two OpenStack powered clouds it tested -- from HP and Rackspace -- were lacking, particularly at larger scales. 

http://www.networkworld.com/news/2013/021913-azure-aws-266831.html?hpg1=bn