I always reason with my DD and we have a 90% success rate. My Ped. was shocked with her communication skills (Talking in complete complicated sentences) and when our Ped. talked to me, she stated that I will probably not have the 'terrible' twos with my DD b/c I will be able to communicate with her. She was absolutely right. I have yet to have a tantrum (knock on wood).

I know the experts argue against reasoning with toddlers b/c the normal toddler is suppose to be like a neanderthal and only understands short responses, but ours (people on this board) are not the norm and our Ped. picked up on it right away and made that connection.