The results are either uninteresting and unreliable, or uninteresting and reliable. Shortcircuit logic keeps me from worrying about reliability.
Your shortlogic is going the wrong way. The results are either unreliable, or reliable. That is what Resig was trying to find out.
And that the Windows GetTickCount/GetTime functions have a bad precision is common knowledge.
Yet the SunSpider benchmark is often used to measure browser performance. If, as Resig says, the error rate for any test run in [Internet Explorer 8, Opera, Safari, and WebKit Nightly] would be huge then SunSpider benchmarks don't have a lot of value.