There really aren't any international servers for the PHP API that we know of. I'll definitely check around and see if I can find any information about that. For the Javascript API, which we also use, we already set it to the correct language. I'm not sure if Facebook uses that language string to load from a server nearer to your locale, but it's possible.
Something you can try, though I don't know if it will improve your situation, is to hard-code the IP addresses for the different servers we connect to. If you go to the /administrator/components/com_jfbconnect/assets/facebook-api/facebook.php file, at ~line 138, you'll see 4 facebook addresses. If you ping them, and then insert their IP address instead of the 'pretty' name, it may shave off a few ms. However, this may cause issues if Facebook ever updates those IPS. It may also give you a clue as to whether it's the actually communication with Facebook or the DNS lookup itself.
Hope this helps, and let us know if you figure anything out.
As for our support. No problem. Glad we could help. If you'd like to leave a review about JFBConnect or our support on the JED, we'd definitely appreciate it, though it's certainly not required. Thanks!
extensions.joomla.org/extensions/social-...ook-integration/7215
Good luck,
Alex