lucy24 - 4:41 am on Nov 1, 2012 (gmt 0)
:: peering into crystal ball ::
You're basing this on built-in header size, aren't you? Otherwise there would be no reason for a structure of
. . <h2>
. . <h2>
YES, the headers should be sequential. That is: not in numerical order from top to bottom, but nested from outside to inside. They're one of your most important semantic markings.
<h1>only one on the page *
. <h2>second-most important category: 1 or more per page
. . <h3>subdivision within the <h2> group: 1 or more per <h2> as needed
. . . <h4>subdivision within <h3> ... et cetera.
If the "look" of your page requires <h2> to be smaller than <h4>, say so in the CSS.
There may be situations where it's appropriate to use headings for a link by itself, but I can't think of any offhand. Here what you probably want is just bigger text, maybe centered or set off in some way.
* Google hates me because I generally have only one <h1> per directory. Secondary pages are, well, secondary. To me that means <h2>.