Technically no. But he is still a lot bigger than any playable character:
...Maybe i shouldn`t have posted that...but whatever. Who cares for what happened in the past game if different model with different, small size is used in current one.
Brawl can scale objects only with items (playable characters only), model`s default size and with animations. His scale values never change in his animations, so, he stays at that size. Its hard to compare them in actual game because of the way they are posed/animated. This method is flawless/absolute/whatever.