I don't think the wood movement is so great that it's an issue. I certainly wouldn't glue a table top down, though.
I have consulted two professional woodworkers on this subject. Their opinion is if the finished product will be in an air-conditioned location the amount of movement would most likely not cause any problem, the caveat seems to be the top should be small enough that any movement would be minimal, not recommended for large table tops under any circumstances!
Here are some fastners for table & Desk tops that are easy to install that you might be interested in, you have to drill a small pocket for the rails and screw into the bottom of the top. They work well.