In that case, he shouldn't have wound up the sprint so early. van Avermaet isn't new to the whole thing. Either he fooled himself or was fooled into going early (like Boonen), or he thought that jumping early was his best chance to beat Haussler, and Haussler was just faster than him.
5th place is no shame, van Avermaet had a good race, just missed a couple of key moves. The others, well, not such a hot performance. Gilbert looked like he didn't really care even when he was chasing the break, Hushovd looked like he didn't have the form, and the others were completely nondescript and did nothing.