I believe the discussions about NN4.7 are largely based on the goal of meeting Web content Accessibility Initiatives(WAI)[1]. WAI was discussed at the Copenhagen Conference[2][3][4] since educational institutions are interested in meeting the guidelines.
How do the CSS class definitions used for .LRN meet WAI? Or, more aptly, do they fail gracefully, such as with NN4.7 or lynx?
In most cases lynx will render DIV (which I presme is a candidate for TABLE replacement) adequately. By this I mean that it will simply display each DIV in the order of it's appearance on the page. Which is essentially the same as it does for TABLE.