watch the video of BigB topping.
Basically you can have more, smaller leaves, or less, larger leaves.
Burleys, dark airs, cigars etc, usually top lower so the plant makes great big leaves, some people top to 10 or less leaves, personally i top the bud only, leaving the little leaves, but if the plant is not that vibrant i take the next 4-6 down granting me nice size leaves off a plant that isnt doing as well.