I've not had the best experience defoliating. Its not to bad if you take 2 or 3 leafs in one go and then don't touch it again, but if your taking leafs one day then taking more a few days or a week later, it really stunts there growth.
I believe it also triggers a reaction in the plant to produce smaller slender leafs, Like in nature as a reaction to having leafs eaten by animals. The plants response is to produce a high quantity of smaller leafs.