You apparently are forgetting how much hype that surrounded Daigle... and the fact that you're saying Daigle wasn't nearly skilled as Crosby just adds to the hype, in my opinion.
Just some quotes:
10. Alexandre Daigle
He broke some of Mario Lemieux's scoring records in juniors and was hailed as, well, the next Lemieux when Ottawa made him the first pick in the 1993 draft. But he never scored more than 51 points in a season and eventually played himself out of the NHL (he's back with the Penguins this season).
http://espn.go.com/page2/s/list/phenomflops.html
At the 1993 NHL Entry Draft, the No. 1 pick went to the expansion Ottawa Senators, and they made sure they nabbed the player who many felt was going to be the next Wayne Gretzky or Mario Lemieux.
The hype that surrounded Daigle was so intense that a solid rookie season, consisting of 51 points (20+31), was not enough for the fans of Ottawa. He would spend parts of the next four seasons with the Senators, but again his respectable numbers did not cut it. They rarely do when the expectations have gone through the roof.
http://www.theahl.com/AHLOnTheBeat03/0122.html
Daigle, 24, never lived up to expectations placed on him by the Senators franchise. He was brought in to sell tickets, which in turn would help get the financing for the Corel Centre. He was considered a marketing dream.
But potential never turned into production for Daigle in Ottawa. Instead, as Alexei Yashin took the spotlight, the guy everybody thought was going to be the next Mr. Hockey had a tough time making it happen on the ice.
http://www.geocities.com/inthesharkstank/article10.html
Daigle was being compared to Lemieux and Gretzky; the next Mr. Hockey. Now he's a warning sign.
Again, I'm not saying Crosby will bust, but it kills me when people are so sure of how well a prospect will do at the NHL level, that any other notion of someone else outperforming that prospect gets blown off as some foolish thought.
My point is, you just don't know. It's certainly fun to speculate, but it's a fallacy to label anyone as a "sure thing."