The Saints OL has been ranked the 2nd best for the last two years because they produce a top 10 running game and give Brees enough time to go through all of his progressions. Brees' ability to read defenses, identify coverage and quickly unload the ball makes the OL's job easier but they run block better than 90% of the OL's in the NFL and give Brees plenty enough time to find holes in zones and quickly unload the ball. They are perceived to be playing well because they actually play well. They are highly ranked becaused they earned that ranking.