I’d like to comment on the performance diffs between TD.Net and NUnit console, as well as other test runners. Different runners have different ways to run tests (I know, hard to believe). Some run them in different threads, and some in AppDomains, that may account for some differences. Because of these differences we also may see other phenomena, like discovering or hiding dependencies between tests.
If anyone has more numbers, I’m very interested in them. Last year we solved a performance hit bug, and like to keep getting better, if possible.