You must have skimmed over the article.  It does involve Montreal's airport. From the article: "Known as the REM, the 67-kilometre-long light-rail line would connect downtown Montreal to several suburbs and the Trudeau international airport."
And what about the finances of the rail link from downtown Toronto to Pearson Airport? You are silent on that for some reason.  Is it a great success? Or is it an abysmal failure as the Globe reported?  Evidence please if you believe it is a success.