This Bruce Reed post contains an interesting observation:
A recent presidential campaign Web site traffic chart compiled by the Internet tracking service Hitwise shows the Democratic side running true to form: HillaryClinton.com the front-runner with 20 percent of the total hits, BarackObama.com in second with 12 percent, JohnEdwards.com in third at 4 percent. On the Republican side, however, the popularity curve is upside-down. Ron Paul, last in the polls, is in first with 20 percent; Huckabee, fourth or fifth in the polls, is in second at 16 percent; Fred Thompson, missing and presumed dead in the real world, comes in third at 6 percent. The Websites for actual front-runners Giuliani, Romney, and McCain are barely above 4 percent, 3 percent, and 2 percent.
If that's so, then it's one more reason the GOP nomination is a test of different propositions about politics. One of those propositions is that the Internet will become more important to our political life. If the "total hits" stat turns out to predict a Huckabee upset in Iowa or a Paul upset in New Hampshire, then such a proposition is correct. But if the race plays out conventionally, with either Romney, Giuliani, or McCain winning most of the contests, then the Internet will have been proven to be less important, at least in a GOP primary context, then many may have thought.