This is still country dependant. Based on this chart players from top countries (Spain, Argentina, Portugal, Italy, France, Belgium, etc.) would be identified as lower advanced.
Impossible or very difficult to reach top100 in their country. And this while they are very very good.
While in low level countries (eastern europe, asia, middle east, africa, UK, etc.) these "lower advanced" players from top countries would suddenly be advanced and easily top100...
E.g. nr.4000 from Spain would be top100 in the UK.