You might find you'd like to change the "edge reveal timeout" which is actually the time it waits before the launcher reveals. The default is set to 150ms, but

You might find you'd like to change the "edge reveal timeout" which is actually the time it waits before the launcher reveals. The default is set to 150ms, but I like it much better at 300ms. You can also change the launcher edge to the right, but that probably has more issues with scrolling. All of that is set in CompizConfig Settings Manager.