Just came across this article on LoadRunner against Visual Studio Team System, by Scott Moore.
NOTE: the article in question is not totally impartial (who is???), as Scott Moore is a consultant for a company partnering with HP/Mercury. The same goes for this blog, in a direction tending towards Microsoft.
There are some valid points made re. the versatility of LoadRunner - Microsoft is not going to get their hands on the innards of SAP and Oracle in the near(?) future, so it's unlikely that they will be able to compete on that front. That being the case, Scott Moore is (IMO) spot on with his call that VSTS is not going to be a LoadRunner killer. ERP solutions will always need load testing and LoadRunner will probably handle that admirably... but having tried both VSTS and LoadRunner, the ease with which a test can be recorded and parameterized without delving into script is pretty impressive. However, the lack of support for Opera/Firefox browsers on VSTS is a fairly large shortcoming, as-is the current shortcomings in data generation and binding.
Having read the article, I think I'll stand by my previous conclusion of horses for courses: ASP.NET or another web app, which can be tested off pure HTTP - use VSTS. Heavy duty requirements? Go with LoadRunner. Either option has a price tag beyond my personal reach, anyway...!
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