I will say, I am just as bias as anybody, but at 2 years 9 months my golden has had over 700 wild roosters shot over him (probably retrieved 90% of them). I hunt with a lot of different guys and their dogs (musterlanders, GSPs, Labs, etc.). My golden is hands down the best retriever of the bunch, but a lot of that probably has to do with the fact that he's had so many more birds shot over him that most the dogs I hunt with. Everybody is amazed as just how quick he is on a downed bird, even from a long ways away if hunting with multiple people. As far as finding/flushing, he tends to run past more birds than I'd like, and if I didn't "beep" him every now and again, he would definitely range further than I'd like, but he is getting better at that for sure with age. I would say on any given day he flushes and "flash points" as many birds as anyone else's pointers/flushers I am with, and definitely retrieves the majority of birds we shoot. I haven't hunted with a great retrieving lab yet (mostly young inexperienced labs), but I would have to venture to guess he is as good as most good labs in that category.
The main reason I have goldens is the demeanor. Great on/off switch, great with my 7month old baby, and zero aggression. He can stay home all day without a kennel since he was 6 months and won't chew or touch a thing, and I couldn't get him to growl or bite me or the baby no matter what I did (outside of the playful growling/gnawing). Zero aggression, great in the house, and absolutely no concerns about him biting an neighbor kid or anything like that. And outside of some retrieving work, I would venture to guess a well-bred Golden is about as easy of a dog to train for pheasants as any.. just get them on birds frequently and they figure out the rest.
This of course is with no bias at all.. LOL.