Great point. As far as I'm aware this changed with the last hard fork, which was yesterday. Hopefully that's the case because my analysis was the two weeks just before that. I think it'd be interesting to do a follow up post as well. I'd would expect more distribution in upvotes but I think the reward won't flatten out that much because of the weight behind votes and the apparent fact that most whales live in a few timezones...but perhaps I'm wrong.