These are the standards-compliance unit tests that the Microsoft IE team submitted to the WC3. Obviously they're only submitting tests that they already passed,

These are the standards-compliance unit tests that the Microsoft IE team submitted to the WC3. Obviously they're only submitting tests that they already passed, but since they focus on passing standards that they claim are important to web development, the tests are probably worth something when combined with other benchmarks. It doesn't mean that IE is standards-compliant on the whole or compared to other browsers, but it does mean there's at least some evidence (albeit biased) to support their claim that they're focusing on standards they consider important rather than benchmarks. Whether these standards are important for real-world applications is something I can't speak to.