"Original counters (in V1.0 and V1.1) reported wrong numbers in almost all scenarios."
http://www.gotdotnet.com/team/changeinfo/Backwards1.1to2.0/default.aspx#00000123
"We’ve created a new set of Performance Counters in V2.0 that are specific to each provider. We're obsoleting all the counters under the .NET CLR Data category..."
[via Phil]
How on earth did this go unnoticed past the testers?