Not sure if those are your opinions or what you've read but here's my response
Jeffery doesn't get separation:
Jeffery isn't a guy like Branch or Welker, he excels at running different routes. He'll gain separation when he's allowed to open up his stride and run straight. Down field routes essentially. He's also very good at the slant and back shoulder throw. (Every team in the league seems to run the back shoulder throw except for us). I disagree that he simply never gets separation. He wouldn't have more than 30 catches is it was that bad.
Work ethic
says who? I haven't seen any legitamte sources.
route running
he's just as good or better than any other prospect
40 at the combine
Indy is one of the fastest tracks there is.
Compared to Floyd
Floyd will go much higher. Jeffery will be there at 27, 31 and possibly 48.
On the contrary,l he's playing in college, which is an entirely different game and where the majority of players never set a foot in the NFL. The two games are vastly different. I don't doubt the guy's ability to be a pro, he will be, but when I watch tape of him his separating isn't all that great. He does however have the best hands of anyone in the draft and his measurables will make him a threat...but just how big a threat will he be? His route running isn't superb or one of the best in the class and neither is his separation...which is why not many teams (if any) have a first round grade on him. A few teams have said they wouldn't touch him until the second round at least.
In terms of work ethic, there have been concerns talked up about his off-season programs at college. People say he showed up out of shape and took a while to get back into it. Even before all the draft rumours came out this year, I heard whispers of his playing weight being a concern. On top of that, as I have already mentioned, despite being 100% healthy he didn't do a single thing at the combine...players tend to perform better at their pro days with their own QBs throwing them the ball. A concern for me is his massive drop off in his final year. Blame having a backup QB all you want, but did having Matt Cassel stop Moss' production in 2008? No it didn't. It's no excuse. Elite players elevate the game of others around them.
Route running wise, no he isn't as good or better than any other prospect. Alshon Jeffery comes from South Carolina who run a very simplistic route tree. He ran those routes decently but from what I heard, at his pro day, his lateral movement and agility drills weren't impressive...which would back up my notion that he isn't a very fluid route runner and will struggle to get separation at the NFL level unless his cuts get better. If he was, as you say, as good a route runner as any prospect then he would be a sure fire first rounder and probably the best WR int he class...which I don't think he is and you'd struggle to find anyone else who does.
The 40 at the combine is run on an artificial grass. 40 times at pro days are generally run on athletics tracks. There's a reason they do this and it's because they're proven as faster tracks. If a player doesn't improve on his 40 time at his pro day he's a wash out in my eyes. At Baylor's pro day Terrance Ganaway was made to look like a speedster on their athletics track. They don'#t even run on a 'track' at the combine...it's just artificial turf on the painted sideline. A college running track is much faster.
Compared to Floyd, Floyd is just flat out better of course. There's little comparison for me.