Do average users expect the Esc key to work on websites?

I'm currently working on a fairly standard website where one page lists a series of projects - clicking on a project leads to an animation and then displays detailed info for it. I've got a back link on the page to return to the full listing and I was wondering if I should add the ability to use the Esc key to go back.

But now I'm questioning if users even make use of Esc when using websites. While it's no trouble to add the functionality, I'd be interested to know if there is any data/wisdom on the subject of users using the key to jump back or if the browser's back button is used more often.