Interesting read about opinion polls

Here's an interesting read about opinion polls.

http://wizbangblog.com/content/2008/10/21/gallup-and-new-coke.php

I have worked in politics and on campaigns. We've reached the point in the campaign in which time, not money, is the limiting ingredient. It seems to me neither candidate is acting the way I would expect if they believed the latest polls.

For example, if Obama had a double-digit lead in Virginia, why is he spending so much time there? If McCain is down 10+ points in Pennsylvania and New Hampshire, why has he been there the last couple of days? And if Indiana is really up for grabs, you better tell John McCain because he's spending almost no time or money in the Hoosier State.

Obviously, each campaign's internals are showing something different than what we're seeing.