Four minutes? That’s a very long time to recover from a stall, unless the computer is fighting your every move...
This sounds similar to a B-727 accident a number of years ago. I can’t recall the airline it was a repositioning flight for a football charter. The pitot heat was missed on the checklist and they were getting incorrect airspeed indications. They ended up stalling then crashing, all were killed.
Air France Flight 447: Pilot Errors?
http://www.youtube.com/watch?v=Uc6iDSOeIng
The airspeed & other mechanical indicators are not the primary indicators.
These steam gauges are secondary to the big MFD display and that is largely driven by GPS input