I suspect that the notice clarifying (or changing) stall recovery procedures is in response to one of the recommendations made in the NTSB report of the Colgan Dash 8 accident near Buffalo, NY.
The NTSB recommended that operators (and manufacturers) take appropriate action to ensure that clear direction is given to crews about the stall recovery procedures for each type, and to emphasize the need to get the aircraft flying again ASAP (as opposed to 'not losing altitude').