I'm not sure those averages are so unlikely. Sure, the "typical" (median, 75th percentile, whatever) user probably doesn't clear cookies or switch browsers tha

I'm not sure those averages are so unlikely. Sure, the "typical" (median, 75th percentile, whatever) user probably doesn't clear cookies or switch browsers that often. But it only takes a small number of users with unusual behavior to raise the average by a lot. If just 1% of users have cookies set to expire on exit, or use a "private browsing" mode, or whatever, and those users visit the site an average of 101 times per reporting period, then you have a 2x overcount already. 101 visits per month is probably high for most sites, but if you also have a significant minority of users who visit your site from two or more computers, that will raise the average too.