That's a silly article.
Janis would be lucky to be #4 WR, nevermind the #3. I could see Adams starting out as the #3 and being overtaken by Montgomery.

Janis is a very good athlete, but -- unless he's made strides -- nowhere as developed of a WR as Adams. He'll make his mark on ST and get a few snaps here and there. If he can't figure out the offense and how to run the routes, he'll be a version of Kaseem Osgood.
I'm curious to see how Davis does. He's also got speed to play outside as a deep threat, and probably runs better routes than Janis. There will be a lot of competition for roster spots.

Do they have a Greg Jennings type on the roster right now? Go back and watch the games from the 2010 playoff run and Jennings stands out. I think Adams or Janis are much different players.