I saved the HTML source of a typical Page: page from it.source, the resulting txt file having ~ 28 kBy; then I saved the "core html" only, t.i. the content of <div class="pagetext">, and this file have 2.1 kBy; so there's a more than tenfold ratio between "container" and "real content".
I there a trick to download the "core html" only? And, most important: could this save a little bit of server load/bandwidth? I humbly think that "core html" alone could be useful as a means to obtain a "well formed page content", and that this could be useful to obtain derived formats of the page (i.e. ePub).
Alex brollo