900 registered voters nationwide, does not a poll make. Assuming you believe in polls.
I am a marketing PhD. We thrive on polling, so I believe that whenever you make a decision, in business or politics, it is better to make the decision with at least one eye open than to go in blind. You take what imperfect information you have and make of it what you will.
This poll is roughly the same as yesterday's Gallup poll, so that adds more credence to it. But no poll has Rudy out of his front-runner status, nor Fred Thompson getting any traction, and that is what really matters. The numbers vary from poll to poll, but the message does not.
Is your objection to the number in the sample or to the use of registered rather than likely voters?