No, there isn't a standard rate of growth for each family of corals. There are way too many variables about coral growth. You could have 2 frags of the same coral in 2 tanks that are set up identically and one will grow faster than the other. You could alter your flow just slightly and it will effect coral growth. Neighboring corals, within the tank will alter coral growth. Unfortunately, figuring out how fast a coral will grow in your tank is an impossible question to answer. You'll just have to wait and see.
Here's an example, in my own tank. I have an ORA Rose Millepora that has been in my tank for 2 years with NO growth at all. About 2 months ago, it started showing a lot of growth. It hasn't been moved, no significant changes to the tank have been made. I have no idea what caused it to start growing.