I followed the steps in:
http://lennybacon.com/2010/10/18/UltimateGuideToSpeedUpVisualStudio.aspx
to make my Visual Studio 2010 faster, including the advice
As the article below states, Open Task Manager and verify the the memory in use by the devenv is more than 2 GB.
Hacking Visual Studio to Use More Than 2Gigabytes of Memory