I actually wrote in for his "Mailbag" feature one time and asked him "how" he watched games.
He put the letter into the magazine and explained that he trains his eyes on the center snap, but post-snap doesn't follow the ball around, at least at first. He keeps his eyes on the interior of the line, then widening focus to the battle of tackles/TE vs. DEs and OLBs. Then he's watching lead run blockers (FBs or pulling OLs) or backs in pass pro. Only when the pass is away or the RB is past the line do the eyes start searching out the ball.
I've been watching games that way ever since and it totally changed my appreciation of the game, much as UFRs have on MGoBlog. His column was the main reason I subscribed for many years until they turned it into a sports version of People magazine.
thanks for the link. i have spent countless hours reading his columns. and enjoying his take on the game.