As someone who has looked into this area for Reddit and HN data, here are a few additional notes before everyone starts submitting their blog posts and marketing pieces to HN on weekday mornings:

1) After everything, the analysis is probabilistic. You are not guaranteed to get onto the front page just by submitting on at a high-probability time.

2) There are game-theoric implications; the more people submitting at a time (weekday mornings), the less likely people will see your post on /new before it is pushed off the first page, and it is highly unlikely to get upvotes once it has fallen off the top 30 slots. (hence the repost/second chance rules)

3) For obvious reasons, don't submit if there is important news occuring. (e.g. Apple/Google/Microsoft event)

4) Above all, if your submission does not get any upvotes, don't interpret it as your post being low quality. The median score of all submissions is 1-2 points regardless of time submitted. (http://i.imgur.com/SN5BuAJ.png)

The OP is impressively throrough regardless, especially since working with ranking data-over-time is much better than working with raw data.