Well, to be fair, the universe's sense of time is dependent on CPU Clock. As long as the same programs are on the same mainframe, the will move at the same speed. Heck, as long as information is on the same server, they will move at the same speed.

... and then we have the PDA scene. Which makes the whole Universe that a program lives in about the size of a large apartment, and it can only rez and compile one program at a time. It is a very sad little world in a PDF...