[Number 3]

I'm going to guess this is all but invisible.

But not knowing the gear spacing, if you run to 8250 in first and then shift to second and don't drop below 6250 then you are ok. But if you don't then it seems like a 1/4 mile run would put you over 6250 for more than 8 seconds. So that being the case, I'm guessing the next gear gets you out of the 8 second range above 6250 rpm.

In the "real world" I would doubt you would ever notice unless you just like hearing the engine in higher rpms and just wanted to play in the upper register, for acoustic reasons only. Then you might find this.