The board has been given a variety of issues to deal with. Sometimes it takes the board less time, sometimes more. On substantive issues—not something like an application before the board on the CN strike; whether that was legal or illegal, the board would probably not take too long to come to that decision—the board has come to a decision in about three months, and on fairly complicated issues they've sometimes taken two-and-a-half years.
On February 13th, 2007. See this statement in context.