The rankings dont move for awhile over the holiday. David Frampton said it took 3 days last year. http://twitter.com/majicDave/status/6994656627
Go download Global Apps on the App Store (it's free) My worldwide rankings are still being updated through that app. I moved from 21 to 19 according to global apps but itunes still shows me at 21. It's also been updating every 6 hours or so with every country ranking. Seems to be accurate!
It is actually called GlobalApps (all one word if you are searching for it). Global Apps is a completely different product.