From the article:
Since last year, MSN has fallen six places, down from #11, while Twitter has crept slightly up from its #9 spot. Amazon advanced most, moving up five positions since 2011, while WordPress has slipped altogether from the list of the top 17 sites. The world's favorite top four sites (see the slideshow to find out which they are) have remained the same since last year. Interestingly, while the #1 site leads in its global reach, the #2 site is the leader in terms of page views and, according to comScore data from december 2011, enjoys longer visits on aerage from users.