I recently took on a very small project to do some modifications to a website. As this website was several years old, it used a table layout. The changes needed to be made on several pages and consisted of removing old information that was replaced with a new link. So, on every page I had to make sure to remove the correct code and no extra tables that would have messed up the layout. This process took me about 2 hours but would have been about 30 minutes on a CSS based site.