At the moment, no. The game is not optimized. Disney didn't have the game optimized much either. We've been mainly focusing so far on getting the game to run in general, and have the features back -- and not so much the optimization part. However, we are going to be taking some time soon to really track down the laggy parts of the game and iron those out a lot.
We have a few updates we need to make to nametags still, which will make the game much less laggy.
Before we go into Beta we really want to have the game optimized a lot more, when the other features are around it gets to be a pain.