Here is the NTSB animation. I think it speeks for itself. Sad sad sad!!!!
http://www.youtube.com/watch?v=lxywEE1kK6I
As a Q400 driver this animation saddens me. I watched it several times.
At around 180 knots the gear was called down. As part of that flow the condition levers went to max. Now, putting the condition levers to max creates a very large amount of drag. The blades are just over 13 ft. in diameter.
It looked to me that after the gear and condition levers were brought up, there was not much power movement
until the stick shaker at which the power levers are increased.
All of this has been established earlier in this thread, but as for the Q400-esque stuff:
Normally, with the "Ref Speeds" switch placed to "increase", with each additional increment of flaps the "low speed cue" will decrease. It is noticeable if at a safe airspeed.
I noticed the "flaps 15" call was made at a very low speed. As said before, additional flaps would lower the "red tape" or low speed cue if the speed was higher and the AOA was lower. I think, the combination of speed and AOA, prevented the low speed cue from dropping due to the airplane from being on the backside of the power curve. In other words, I'd say the airplane's computer knew what was happening before the pilot did.
In icing conditions, I can honestly say
I've never seen the speed that low without having already configured.