Where time (clock ticks) and space (reserved memory) are limiting factors, CSS driven pages are more likely to receive thorough and quick parsing of the page markup and indexing of the content, with time and space to spare. Tabled pages require more memory and time to disseminate, and if the above limiting factors 'were' to apply, the job might not be done on the first pass.

Centralized control over presentation is both time saving and space conservative. All the styles can be stored in a hand full of files which will download once, and remain in the browser's cache for any length of time, making future pages download even quicker. Kgun mentions that the files are usually in the servers primary cache, as well, so first time visitors receive the advantage of faster downloading of your pages.

CSS offers another real advantage when it comes to reducing the number of img tags in your pages, especially the skin graphics. Assigning background images in CSS is the easiest way to repeat graphics over an entire site, reserving img tags to just photos in the page that you want indexed.