I found this surprisingly accurate breed write-up today. I question the stated normal lifespan as being generous (8-9 would be more accurate on average, though dogs aged 10+ are not unusual). Otherwise it's one of the better I've seen.
http://www.vetstreet.com/dogs/flat-coated-retriever#overview
http://www.vetstreet.com/dogs/flat-coated-retriever#overview