Even though I am not really sure about the total impact of all of these numbers, except maybe getting a sense of longer confirmation times, I think that I agree with you that hourly averaging may be a better depiction of block fullness as compared with block averaging of fullness over 24 hours, if that happens to be the case with the blockchain.info charts?
Which chart are you looking at? I don't see one which relates directly but I may be looking in the wrong place
(apology from earlier accepted BTW)
Edit: NVM, found it. That looks like daily average. Might be instructive to plot it as a distribution.
Even though I had posted the link several times before, just to be more clear for you and for any others who may be interested in the topic, I have been referring to this chart.
https://blockchain.info/charts/avg-block-size
And, today does seem to be up in that chart, as well....