No, I don't expect Moose/Smith numbers. Those would make him the #1 overall WR by a significant margin. Both players averaged almost 15 points per game, and scored more than any other WRs in the past 4 years except for Moss in his ABSURD 2003. Keyshawn could get just 75% of those numbers, and he'd still rank as a top-10 WR.
Anyway, I'm not so convinced that Keyshawn has a "lack of ability" here. First off, I feel like the drop in Key's ypc last year had a lot to do with the role he was used in. There are three points worth making here. First, the last time he set a career low in ypc, the next season he posted a career HIGH in ypc. Second, just two years ago he had the second-best YPC of his career. Third, Jake Delhomme has a demonstrated history of helping out his WRs. Discarding Muhammad's rookie season, he never averaged fewer than 15.1 ypc in two years with Delhomme... and he never averaged more than 13.8 ypc in 7 years without him. That's significant.
SSOG, I agree with your reasoning on Keyshawn. However, the bolded statement is just not correct. Both players had great years but we are not talking historically great.From Pro Football Reference:
2005 Steve Smith - 237 Fantasy Points
2004 Mushin Muhammad - 238
2003 Randy Moss - 267
2003 Torry Holt - 242
2002 Marvin Harrison - 239
2001 Marvin Harrison - 243
2001 Terrell Owens - 239
It looks to me like they put up pretty much what you would expect from the number one receiver in the league. Totals that have been beat 5 times in the last 5 years.
Although you are right about Randy Moss' 2003 being absurd.