The numbers are much lower I think, at least nowadays.
> On average, a user visits about 100 websites per month, totaling 1,200 websites per year.
The number of 100 websites per month is pulled out of thin air. Following the links it seems to be based on the number of web PAGES visited DAILY by Americans in 2007.
In my anecdata most people are online a lot but mostly in just a few apps and websites.
So I guess all numbers in the article should be much much lower.