I think the 'viewers at home' tend to be biased towards the big and common breeds. With labs, I'd think part of their problem is decades of quantity over quality-it's harder to create a perfect show lab. With Goldens, I'm biased but all the ones I've met (pet/show type, as opposed to the rather rangy, flatter-coated working dogs, which don't look like show Goldens) have had dryer lint where their brains ought to be.
And I'm sorry, but I say German Shepherds can win again when they stop breeding dogs with backs that tilt at 45 degrees to the ground.
(What do I know? I'm still holding out for a Clumber Spaniel best in show. I love Clumbers almost as much as Sussex. Trying to convince my Dad, he NEEDS a nice big upland bird dog to stroll around the farm. He likes them, but as he doesn't hunt birds, he's unconvinced of a Clumber's nescessity.)