In a best of 5 series, I think Davidson may (possibly) be better than a couple of those teams. If Davidson pressures and it causes problems, if they get hot and or a lot of 2nd chances on long rebounds there could be issues. It's a sexy upset pick for those looking for a bracket buster. Conversly, I find it hard to see a scenario where Iowa doesn't shoot a ton of freethrows and I like "and 1's" much more that 22' jumpers.
You do realize in order to get an "and 1" you have to actually make they layup when you get fouled right? That's something that doesn't seem to happen to hawkeye players too often.