I'm trying a fix for this this morning. It might take up to 24 hours to fully take effect.
If by the end of today (Tuesday) you're still having this problem, please reply to this thread. Or for that matter, if you can say that the problem definitely stopped, also post that please.
This is where I'll be looking, and this is where I'll be giving updates.
Thanks for your patience and sorry for the continued problems, we're very close to the finish line now. The lag is fixed, and we just have to tweak some of the new settings to get everything tuned properly.