I just looked at your page from another thread and didn't see it loading slow. Unfortunately, if it is though, there's not much we can do directly. I noticed that you have other Like buttons and other Facebook extensions installed. If you migrate to use JFBConnect's extensions, it's possible that will speed it up as everything will use the same method, but I can't guarantee that will improve much. There's a lot of factors that go into the speed, including your server, your location to Facebook's nearest Content Delivery Network, and the speed and congestion on Facebook's servers.
Good luck,
Alex