That fact we're "logically" arguing about this would lead me to believe they are in fact being somewhat "selective" or as you stated "liberal" with their designation.
Since that's the case I would think an argument could be made for Duncan and J O'Neil being considered centers. That would, IMO, knock Shaq out of the first team all NBA since IMO both TD and JO have outplayed Shaq this year.
I'll agree with that. See, Texans aren't all bad. B)