I agree that "more than 10 votes" is more of a line in the sand then a hard science. It was more important to me to have a very clear and consistent success metric, than to come up with the "best" success metric. My statement that "that's enough to get on the front page" was very hand-wavy, and might have been better left out.

Maybe you're right that the "pros" tend to post their content on weekday mornings, hence the higher discovery rate then. Interesting that the weekends would still show more success, though...

In any case, it's clear that I need to make my caveat about correlation-vs-causation more prominent.