Some might say that training should not be conducted in aircraft that do not exhibit all the symptoms or which do not spin etc.
Although if that viewpoint were carried, you'd have to replace around 70% of the world's training aeroplanes.
I tend to think that although there's a near-universal stall recovery, there are not universal stall warning symptoms, and that's where pilots need to know their individual aeroplane - this should be impressed upon them throughout their training.
G