The Yak has a large heavy prop which will acts as a gryroscope. You don't want gyroscopice forces affecting the recovery. I think it has more to do with this rather than the airframe being spun around by the prop. In the Tucano, the incipient spin recovery was centralize the control column and close the throttle - for this reason. In the less powerful Chipmunk and Bulldog, it was just centralise the contol column.