Airspeed indications could be extremely important here.
As somebody stated earlier it seems very unlikely both pilots would let a plane get so slow in such a critical phase of the flight.
Reminded me of the
Flybe incident where the IAS and altitide indications became erroneous due to the pilots forgetting to activate the pitot/static probe heat.
In the report it is stated that even the standby IAS indicator
failed -Luckily the flybe crew had altitude and therefore time to diagnose the problem and take action(see report below)however this could have been another story had the airspeed anomalies started to happen on final approach while low, slow and vulnerable.
It seems more plausible that someone could forget to flick the
probe heat switches than for a certified icing system which we know was switched on to cause any problems in
moderately cold conditions.Looks more like a standard stall due to a faulty IAS indication and subsequent lack of airspeed.
The pitot heat switches dont have much throw as shown in the AAIB Flybe report and could be mistaken for all switches on despite all 3 actually being off.
Incident
A FlyBE Dash 8-400, registration G-JECG performing flight BE688 from Edinburgh to Belfast City with 71 passengers and 4 crew, encountered multiple instrument failures shortly before reaching FL160 after takeoff while climbing through heavy precipitation in icy conditions, the failures consistent with freezing of the pitot/static ports
Full Report -very interesting
http://www.skybrary.aero/bookshelf/books/585.pdf