Big difference between Tebow hurling the ball into the air and letting Demaryius' jump and get it versus the route and timing connections that Peyton is developing with these guys right now.
It's hard to figure out Thomas vs. Decker since both are arguably top 30 WR with Manning in town. Whether one is #17 or the other is #22 I'll tell you for sure they are both receivers you'd like to have on your roster. Both are 6'3" and great NFL size, good hands, good speed and now have enough time under their belts to take a step up in the NFL. Both could surpass 1000 yards and both could touch double digit TD's this year. For myself? I love identifying guys like this in a tier of value and draft whoever falls to me.
Keep in mind that timing is a very big part of the NFL and it will take some time for Peyton to develop it with both of these big WR. Don't be surprised if they have a slow game or two to start the year, either.