Layout with inbricated tables is obsolete, this is no secret nor revolution!
Using <div> layers associated with CSS is the new integration and layout format for all documents.
This new "fashion" brings it wave of fanatism and most of all incomprehension and wrong usage. To sum it up, people are thinking " all right! I can get rid of all my tables and use <div> instead! ".
Then they have as many div> in their code as they had cells in their tabs, and they think that layers and CSS are no improvement at all.
This is what happens in many cases, <div> are overused, there are too many imbrications and sub divisions just to say " oh, I'm using <div> ... ".