Obviously not <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> But seriously: a full install usually results in a better performance, yes, or can just make things easier. Look at Baldur's Gate: installing the game in its entirety means you avoid having to switch cd's all the time.

I am in blood
Stepp'd in so far, that, should I wade no more,
Returning were as tedious as go o'er.