I hope this was journalistic misinterpretation, caused by ignorance of the things aeronautical and that neither Colgan nor ALPA actually reached the level of idiocy at which they would be able to claim that "cockpit warning system failed to adequately advise pilots when the plane's speed was set below the calculated stall warning speed" or "the plane didn't have, nor was required to have, systems that would have alerted the pilots that "the air speed was abnormally low.""
As if Q400 doesn't have speed tape with low speed cue. Or shaker. Or pusher.