Huh ?
That's not true at all.
See :
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnnetdep/html/redisteula.asp
*You may conduct internal benchmark testing of the .NET Framework component of the
OS Components (".NET Component"). You may disclose the results of any benchmark test
of the .NET Component, provided that you comply with the following terms:
(1) you must disclose all the information necessary for replication of the tests, including complete
and accurate details of your benchmark testing methodology, the test scripts/cases, tuning
parameters applied, hardware and software platforms tested, the name and version number
of any third party testing tool used to conduct the testing, and complete source code for the
benchmark suite/harness that is developed by or for you and used to test both the .NET
Component and the competing implementation(s);
(2) you must disclose the date(s) that you conducted the benchmark tests, along with specific
version information for all Microsoft software products tested, including the .NET Component;
(3) your benchmark testing was performed using all performance tuning and best practice guidance
set forth in the product documentation and/or on Microsoft's support web sites, and uses the latest
updates, patches and fixes available for the .NET Component and the relevant Microsoft operating
system;
(4) it shall be sufficient if you make the disclosures provided for above at a publicly available
location
such as a website, so long as every public disclosure of the results of your benchmark test
expressly
identifies the public site containing all required disclosures..."
Please don't spread FUD.