It's only one win. Look at the previous winners of the race, many did not even turn pro. If you are an American, remember that the likes of Farrar and Pate were very strong in these races too but turned pro and almost vanished without a trace, Pate had a good stage in the Tour de France last summer and Farrar re-emerged this Spring. But one amateur win doesn't mean much at all, it's only the start.