Hi - this is superbly detailed analysis - the kind of thing that should be linked to in the FAQ page... I know for a fact that I vote too early!
You might want to add in a little conclusion at the end (if I've read it correctly) - for maximum curation rewards... vote at between 20-30 minutes!
Interesting comments below about the bots... which I guess means that profiting from manual curation is, in the future, going to be more of a challenge!
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Cheers - I checked out your post because I was following a 'data analytics people trail', not because I was looking for curation tips, but hey that's useful to know, I'll check it out.
It's one of the downsides of steemit ATM that it doesn't really do the freeze frames of your graphs justice!
Great work though. I will check out those other 'basics' posts.