What are you saying there Scotty.

If you change to 3rd and then finally reach 4700rpm (3rd gear @60mph) it is not full power and adding an extra gear change is going to make a huge difference to the 0-60 time.

Using 1st & 2nd gears will get you your quickest 0-60time. If you want to carry on accelerating past 60 then yes 3rd gear will be necessary, as will 4th and 5th.

Oh, and peak power is @ 6000rpm.