From talking to some of the staff at Avery, it would seem they mash all their beers at 149* and from their website, you'll notice they have lower-than-average FGs. They're also a fan of turbinado, which helps their big beers.
To paraphrase Dr. England - "Off-flavors smooth with time. So do mountains. Brew it right from the start!"
My blogsite: http://nateobrew.blogspot.com/