So if you start just a tad bit slower, you can then finish faster, and the whole octave run will appear to be faster.
I remember a comment that you made on another youtube video, that said that you found #8 harder than #5. Do you still think that?!?!
Been intermittently "lurking" in your YT channel over the years and particularly liked your take of Gershwin's "Rhapsody In Blue". As they say "You are one hell of a talented dude"!