I'd only like to add that sometimes, people's evaluations, particularly praise for 2nd and 3rd string potentials can go way, way overboard. They'll see a 3rd string player make a couple of really impressive plays against other guys lower down the depth chart and all of a sudden he's the saviour of the franchise.
It's one thing to evaluate and say, "Hey, this guy could help us on game day when we need him." It's another to be all, "OMFG this guy should be starting! He's going the be the destroyer of worlds! Pro Bowl or GTFO!!!1"