Hug is only a tradition same as bow. Now hug begin popular here because we affected by west tradition.
Usually we just do Anjali for greeting. Even shaking hand is seldom.
Here in my place, bow to Buddha, monks and our parents, is something common.
I will do both respect him by bowing and practicing his teaching.
So I feel lucky born in Buddhist family, the tradition give a lot benefit to me.
When bowing I can express my feeling, a great honor and gratitude to my teacher.
So hug a Buddha is just feel uncommon
we have different tradition indeed.