Hey, I'm currently working as a marketer for a firm called 7lux.ca and I recently discovered that their logo was receiving 17% of all the clicks when the clicker is on the homepage. It's pretty common knowledge that logos lead to the homepage, so why would so many people click on a link (logo) that will lead them to the same page they are already on?
Are you using Google analytic to check this percentage ? If there are more that 1 page(home-page) then people would be clicking logo to go to the main page. In Google analytics, the click % is for a particular link irrespective of no. of same link on the page.
Its common tendency to click on logo. yeah logo is very important part of the website. If you will see in google analytics than you can get exact stat.
Sites logo link that site's home page, so everytime anyone like to go that site home page they click on logo as I do...simple.