But how are prices synchronized between exchanges (if at all)? i.e. say the best chance for my order being filled is at ARCA, but I submit it at INET. Does the

But how are prices synchronized between exchanges (if at all)? i.e. say the best chance for my order being filled is at ARCA, but I submit it at INET. Does the fact that it will most likely get routed to ARCA via INET imply there is a greater chance of the order not filling than if the order had been submitted to ARCA directly?