That's true, we could be missing that (though the gaps I pictured were for all three lanes so this wouldn't affect those). Fortunately when the actual 10.13 comes we won't have that uncertainty, though Chuck may have to add another camera angle or use the dash cam footage.
Yeah, this is a failure per above criteria. But going briskly (0 to 50 in ~7 seconds) when someone is 6 seconds away will not result in that, and it's nice and comfortable easy driving.
As mentioned, Criteria #2 is definitely the hardest and the most nitpicking one. Because it's a balance, I said I'd just know it when I saw it, which obviously leads to a lot of latitude and room for disagreement. So these particular ones were failures to me (assuming nothing weird was happening off camera). But it was close.