Though probably most exhaustive (which other metric will measure Web stats from Feb. 1996 on?) it looks _very_ US-centric in my view. While US=World in terms on internet coverage early on, it is certainly not true now, and will become ever more untrue in the future.

This list certainly ignores _many_ 'elefants in the room'; those who try to rely solely on it for high-level overview of development of the internet, will have a distorted view. I won't bother listing the others because my view is biased, too, and I'll obviously won't think of many.

Just FYI: Russian Liveinternet counter, unique daily visitors: http://www.liveinternet.ru/rating/index.html?lang=en

Looks like they used comscore for the bulk of their sources -- which only looked at US traffic to "web properties."