I\'m running performance tests against ATS and its behaving a bit weird when using multiple virtual machines against the same table / storage account.
The entire pipeline
I suspect this may have to do with TCP Nagle. See this MSDN article and this blog post.
In essence, TCP Nagle is a protocol-level optimization that batches up small requests. Since you are sending lots of small requests this is likely to negatively affect your performance.
You can disable TCP Nagle by executing this code when starting your application
ServicePointManager.UseNagleAlgorithm = false;