Well at least one game so far states Yanick Roy the studio director for the Montreal office of Bioware.
http://blog.bioware.com/2012/11/12/an-update-from-bioware-montreal/
That evolution now takes its next step, with the news that the next Mass Effect game is already in development, driven by the team here in Montreal. This is the goal we have been working toward for years now, and every member of our team is proud, excited, and humbled to take on the responsibility for the next game.
To ensure a proper and effective transition, we’ll continue to be supported by the Edmonton studio through the game’s development, working with and learning from them on some critical initiatives. On top of that, Casey remains the Executive Producer, but he will have a Project Director under him, working in Montreal, leading our development team and making day-to-day decisions for the game. We all care very much about Mass Effect and make our decisions based on what’s best for the game.
There is really not much I can tell you about the game right now, except that it will be built with the amazing technology of Frostbite as its foundation, enhanced by many of the systems that the Dragon Age III team has already spent a lot of time building.
http://blog.bioware.com/2012/11/12/an-update-from-bioware-montreal/