6-10 FPS
Yes it is definitely the FPS Lag, ignore anyone who says it's not/your computer sucks. I know people with very nice gaming computers getting it too.
Well your upload and download speeds are good. I don't understand why your ping is so high though.
Try to go in worlds that have low ping. Runescape has been fucking up too though so it might not even be you.
Are you sure it isn't your internet connection? www.speedtest.net
check out that website to see your download and upload speeds.

