While they may have been out-of-town climbers not wanting to waste their travel window (I have no idea), you should know that Quebec's mountain winters are notoriously brutal. 70 mph winds and 0 F? Meh. Of course, the Laurentians (or wherever they go winter climbing) don't have the altitude, crevasse danger, disorienting whiteouts, and terrain of Rainier. Who knows what they were thinking, going up there. But they were incredibly lucky to be able to reach help, use their gear, stay out of the elements, and have experienced, skilled rescuers available to guide them down.
Back to the cell phone coverage, though. Seriously, what's up with that? I live in Seattle, have AT&T and an iPhone, and my service cuts out at Ashford. I don't think I could even make a 911 call. I'm very conscious of that when I'm up there.
Anyone else have similar cell coverage? Or better?