Can't ya just answer the question?
I live by the interstate, and jump on it all the time. Winding out 1st gear on a Busa is suffcient for merging. I have 25 miles on my '05, and have the flu. So I can't go out and try it.
well its pretty fast but i havent tried it and probally won't look down and see if i ever do, if i were you i would put it in second cause it has plenty of power to merge on interstate