I would love to see a meta-analysis of the 'when to post on HN' articles to see if a) there's consistency, and b) if the stories themselves have skewed subsequent conclusions (i.e.: will everyone now post at 7:45 on Sunday morning?)
There is a bunch of analysis I did behind the scenes to motivate this choose. I'll be posting the source code for my analysis, so it will be easy for anyone to critique and compare.