[floobertoober]

I think that this assumes a uniform distribution of "interestingness" in the competing posts across all of those dimensions and I wouldn't be surprised if that isn't the case

[jedberg]

It may not be even, but I don't think interestingness is correlated with time of day. But I could be wrong!

[sadeshmukh]

Interestingness is subjective, and I would imagine different timezone people have different preferences. Interesting thing to ponder for a bit