Wide receiver is a notoriously difficult position to master in your first year. There are a few exceptions, most notably Eddie Royal and DeSean Jackson who both had excellent introductions into the NFL. Usually however, there's some teething problems and Butler will be no different as he adjusts to the pro-game. But he can help the team right away, he absolutely can.
During his years in Atlanta and Oakland, Greg Knapp showed a tendency to go down field more often than Mike Holmgren did in Seattle. The quarter backs available may have had some influence, Matt Hasselbeck doesn't own the kind of rocket arm associated with Michael Vick or JaMarcus Russell.
However, too often in 2008 teams simply didn't fear Seattle's passing game - helping opposition defenses to stack the box, blitz freely and shut down the running game. Butler's raw speed (clocking 4.38 at the combine) will if anything help keep the offense honest. His ability to get deep and stretch the field is something the Seahawks didn't have with current starters T.J. Houshmandzadeh, Deion Branch and Nate Burleson. For the passing game to receive greater attention, having that outside threat could generate a much more balanced Seattle offense in 2009.
But it's not just the threat of Butler that could cause a surprisingly good rookie season. Butler explodes in and out of his breaks and shows a real ability to get open. There's a reason he broke Bobby Engram's Penn State receptions record (179 catches, 2771 yards, 22 TD's). He flashes the ability to make great catches but shows occasional inconsistency, yet nothing out of the ordinary for a young receiver. For a relatively small man (5'10") he's combative in his blocks and shows the desire you want to see from a wideout coming into the league.
You're not going to see a 1000 yard season from Butler, but his presence will be felt in 2009. His signing was as much 'win-now' as Seattle's choice of Max Unger in round two and he'll have a role to play in Seattle's attempt to bounce back in the new Jim Mora era. It wouldn't surprise me if other more productive players on the Seahawks roster are praising Butler by the end of the year for his overall contribution, even if he'll have to wait until later in his career to follow in the footsteps of former Nittany Lions' like Engram.