You never know with Twitter; I just got burned by Rupert Murdoch, who turned out to be boring, and Wendi Deng, who turned out to be fake.
But I've had @JennyHolzerMom open in my browser tabs since before Christmas, and though it's the Twitter feed of a fake mom of a teenager, it just stays really good.
Though I find a lot of the fake twitter profiles funny (at times) I just can't bring myself to follow them. I have real friends who are funnier.
-M