While you can go full throttle in limit mode, you won't want to. The limit mode limits the RPMs (to 3500 I think, or it may be 35 MPH). Either way, it'll make a horrible noise when you hit the limit.
I tried using limit mode once with a newbie friend driving, but it was useless. The noise was horrible and it made driving it a major pain.
I had asked my dealer the same thing when I got mine about 6 weeks ago. His advice (good or not) was just not to overdo it and don't go full throttle or anything like that for a while. Even at 3/4 throttle you'll be going pretty fast, so I wouldn't be worried about it.