That is of course true, but then anything used too much or in the wrong place is a pain in the back side... I have seen people use h3 titles for most of their text with the thing redesigned in the CSS and then use a span to define the titles, which structurally is dead stupid.
If you don't know it, there's a great site for CSS design here, I found it quite inspiring...

But let us return to the thread at hand...

In fact, just for that, I'll be Thread-Hijacking Swedish Pirates today