I think there is a mistake in the above article. I do think the most visited relegius places will be Mecca or tirupathi.
As i hail from tirupathi ,The weekly count by people is not less than 1 lakh and on 3 major holidays i.e Summer,Dussera and Christmas,It will three times the average weekly count.
In one of the discover travel and living programs,i came to know that Mecca is close to tirupathi.