I've been tracking the CDG flight (CO57 on a 777) for the past week or so, since I'll be taking that flight soon. It has been arriving into Terminal B every single day since I started tracking it.
From what rkkwan writes, I guess this is a good thing, with lesser immigration lines (my primary concern, as I won't have checked luggage, and I won't be continuing on another CO flight that afternoon).
Bostonbali