MadCacher and I are following each other on Twitter. His latest blog post is about benchmarking. You can read all about benchmarking at geocaching.com's page dedicated to benchmarking.
I have searched for two benchmarks. They are very intriguing in concept, but once I get to one (or not), I feel really disappointed. After reading MadCacher's blog, I might try again. If I find one on a concrete post, it wouldn't be buried under snow, right?