I do table less coding, so i will vote for Divs. Still there are plenty of applications where you are bound to use tables, we cant reduce the value of old HTML as it will never disappear.

I have few clients who do smarty templates and they are more comfortable with Tables, as per them it's lot easier to port an HTML to smarty where as I have a client who do wordpress templates, he only want CSS/xHTML and that too x-browser compatible and validates W3C.

So, I feel as a coder we must fulfill client's demand. If he is comfortable with CSS/ xHTML (Tableless) we will go for it or if he wants tables we have to do the same.