is definitely push-style.. I've updated the main node. Never heard of it til now. Question is, why is it in the CGI namespace? It could be used on plain text and standalone with no web sense whatsoever.
Thing is, breaking a table into 3 files as shown in the full example eliminates one major push-style benefit, the ability to statically validate and clean HTML... and another push-style benefit: the ability to edit with an HTML page-oriented tool.
Interesting module nonetheless.
Finally, your statement about Seamstress and div/class tags is a bit of a simplification. The more recent API calls in Seamstress can use anything that the look_down() method in TreeBuilder can.