CryptoBridge doesn't have any central server, that's why it's kinda slow. They use BitShares nodes distributed over the world, so your usage speed depends on your latency to the node you are connected to and the current load of the node itself. You can see that in the bottom-right, and switch to a different node. There's an automatic setting as well, but I've found that for me it's better to select a node manually.

Also, anyone can run a node and help with speed and decentralization. If you run your own node, you can connect to it completely locally and have a 0 ms latency, some people do this and the node can be private.