My experiences with the CDG concierge with ground transport were also unhelpful (couldn't tell me how long it would take on a Saturday morning to get to the airport under normal driving conditions). She did spot me in the disorganized queue however, upon boarding.

That said, it was eerry (but comfortable) to come into the CDG MLL dungeon and have it look like any Canadian MLL (check-in desk, uniforms, wallpaper, etc.)