Kasper,
Sorry for the delayed response. Facebook does allow you to see how many comments are in an article, but we don't have that ability built into JFBConnect yet. It's something we're looking into for a future release.
If you have a developer that you work with, we can gladly help try to guide you along the process and get it implemented. That will help us work on it as well for the next release, but we don't have the time to implement it and fully test it right now. We're shooting to have the 4.1 release out by the end of the year, and can easily see this in that release.
Hope that helps, and glad you're liking everything else so far.
Thanks,
Alex