Hi BOAC, I have seen a number of light aeroplanes where the deceleration rate is significant in both stall speed and stall characteristics. Probably the most marked I've ever seen was the French Aviasud Mistral, but there are significant effects in most sub-2000kg aeroplanes if you look at them.
That said, I think that if the rate is kept in the order of 0.5 - 1.5 kn/s, the effects should be acceptably small.
G