Now that Vernon Davis and Alex Boone are officially holdouts, I can only say I'm surprised by one aspect of it.Davis' holdout.Hunker down on the Boone situation. It could take a while. I've been under the impression since April that Boone has no intention of coming into camp unless he gets a new deal. Unless Boone changes course and decides he can't stay away, I think the only way he comes in is with an extension.The 49ers are also steadfast in their stance.