That's Weak
His analysis of the data he presented was faulty. First he ignored the year's data that didn't support him, then he made excuses to ignore other polls. His comment about your poll may be accurate, but fits a pattern. Statistics aren't that hard for any competant mathematician. Asking meaningful questions is far harder. I'm not sure Gallup did all that good a job, do I see no reason to ignore other pollsters.
Regards,
Mark