Yes. And other things, too.
We didn't win Iowa because:
1.) The establishment didn't want us to win Iowa. The National party pressured the local politicians and even said that Iowa would lose its first in the nation status if Paul won. That was enough to cause the local players to look for an alternative.
2.) The news letters left a somewhat sour taste in the mouths of SOME moderates who would have otherwise rejected Romney and Santorum.
3.) The news letters made GOP insiders think Paul never really had a chance to win a national election, hence item #1 above.
4.) The Paul campaign was not prepared to deal with a Santorum surge, which was foolish. They should have known it was possible, given the religious nature of voters in Iowa, the tendency of GOP voters to cycle through front-runners, and the effect that churches and the party establishment could have on low-turnout caucuses.
5.) Romney's political machine and voter turnout was top-notch. He had it down to a science. We had the passion, but not the organizational know-how that he had.
Now, in spite of all of these things, I think the Paul campaign was VERY well-run, and I think that candidate Paul did a pretty remarkable job of being bombastic and message-driven, while still trying to appeal to a broad base of voters.