Just this morning someone on an internal microsoft list pointed me to a promising looking (and free) .csv parsing tool - http://www.logparser.com/ It claims the ability to run SQL queries against CSV files. http://www.microsoft.com/technet/community/scriptcenter/logs/logparser/default.mspx
This could be handy for looking at the .csv files that are generated by vsperfreport, especially if you need to do this stuff programmatically. And not to let CSV steal all of XML's thunder, vsperfreport can generate XML instead if you prefer parsing that.
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