Depends on your definition of "conditioning." Many brewers just let their beers sit in the bottles over given periods of time, and call this "conditioning."
Just because the propaganda on the bottle says bottle conditioned, it doesn't mean it was naturally bottle carbonated. You can let any beer sit in a bright tank to clear up a little more, and/or run it through a micron filter to remove most of the suspended yeast.
Such beers are usually force carb'd and then just allowed to sit and mature in the bottle.
Beer so good, it's frightening.
2014: Seven Heavens Series One: Vilon, Mystic Melomel, Skeeter Pee.