Apologies dear friend, but internet connection will only cause framedrops due to being unable to process data from the server.
But this has nothing to do if you are either in a crowded area or not.
Agreed in a crowded area you will have to process more information but a poor connection will result in a constant framedrop no matter where you are.
So lets say he starts at Tython, and he does not have problems playing but then comes to corruscant and has problems with framerate, then its NOT the internet connection but the grapical or processor speed.