Lowry is a mental midget. If Lowry knew anything about statistics, then he would debunk (see, I can use that word too) polling averages. Polling averages are like averaging apples and oranges to get bananas. The methods used, the sample populations, the questions, and even the underlying mathematics in individual polls are different. Rule #1 in statistics: A poll tells you about those who responded to the poll - that is the sample population. Even with that, there is always error in measurement. It is called the margin of error. By the way, there are multiple methods of calculating margin of error. Pollsters never tell us with method, although you can some determine the method with simple algebra given enough variables in the poll results. Additionally, pollsters never give correlation statistics - that is the correlation between the sample population and the population in its entirety, e.g., register voters, all voters, etc. Writing of which, how do you average register voters with all voters or all adults in the US?
Again, Lowry is a mental midget. Don't believe a single word he writes.