How is the proof in the pudding when most are still really young or haven't even arrived on campus? There's a difference between taking a guy with the frame and athleticism but needs fundamental and weight room work versus a guy who is nearing his max frame wise and isn't all that athletic and doesn't have much room to grow.
In the coming years the results will speak for themselves. It won't be speculation at that point.
Keep in mind that pretty much every player on every team hits the weights and is seeking to improve their game, get stronger, etc. Improvement is not good enough. You have to be better than the guy on the other side of the line of scrimmage. It's a zero sum game. It's an obvious statement, but people tend to see what they want to see.