I did a quick test tonight.
Took the car on a flat bridge and went from 80km/h to see what speed i would hit in different gears.

In third(shift to 4th at 140Km/h) i hit about 150km/h starting with 80km/h.

Starting the same speed in 4th i hit a solid 140km/h in the same distance and direction. Does it seem like im missing top end?

Im pretty sure 6 ports are opening, but the car has intermittent hesitation at 6700rpm +

 

umm no way
4th gear has way less pull then 3rd gear from 80km/h of course 3rd gear will get u to a higher speed faster
its not different then being stopped and doing the 0-60 in first gear and then doing the 0-60 in only second gear
the car will lag lots cause the rpms r low when they get above 4 grand the car starts to move real good

well thats what i think im pretty sure im right about it haha

 

Hey CanadianRX7 how do you like the GXL? Pretty fast for someone your/our age? I am thinking about getting one....

 

Yea, i realize that, i was thinking that there should be a bigger difference between gears