Can you test our demo site to see if you're having the same problem there?
www.sourcecoast.com/jfbconnect/demo/social-modules
That page loads them all, so is usually a worst-case example. Usually though, there really isn't anything we can do to fix it as those modules are loaded through Javascript by Facebook which then populates the contents. If you're using multiple Facebook extensions, that could cause some conflicts with JFBConnect and possibly slow things down.. it also could be caused if your site has a lot of other Javascript features on it..
Let me know how the demo site compares, and if there's a specific page on your site that is worse than others, let us know that I can check it out to see if there are any obvious reasons.
Thanks,
Alex