I have calculated that I will be 40 before my student loan will be paid off... I've been paying it since 2003
I remember producing paydown charts in the early 90s and thinking it'd take forever to pay my loans off, but I planned the amounts I wanted to pay each month (more than the minimum whenever I could) and it got done. My rising income over the years helped more than I could have predicted when I started.
EDIT: I mean this as an honest question, not proving a point or something. I was under the impression that these loans have pretty low interest. If the interest is low I would pay as little at a time as I possibly could.