The other 30% say they don't need them, so don't see the point in the expense or added weight. Looking at the people posting on the forum, it seems to follow an age divide. Young folks go without, older ones like a little extra support.
So what are the best poles? Posters seem to prefer Leki. They're light, collapsable, and many even have shock absorbers.
Do you use poles? If so, what kind?