As I've always suspected

Lies, Damn Lies, and Polls
David W. Moore, who worked for Gallup for 13 years as managing editor and senior editor of the Gallup Poll, has a new book out denouncing most polls by Gallup or anyone else as useless, and explaining that this became obvious to him when he first began work at Gallup, raising the obvious question of why he stuck around for 13 years. The explanation seems to be that he was trying to fix the problem, and one of the motivations for the book seems to be that he believes he still can fix it.