I think the new version is caching more efficiently (specially with some tweak as written in developer's own blog).
There is over 30 milliseconds improvement on average for me (Holy Shmoly!) as per webpagetest.org. It will be probably better to add the CDN Sync Tool like function as default (with minify option) to upload the static files.
(I am not going in to detail of origin pull and push as Donncha will understand my point.)
May be the cache HTML files can be served from CDN (it actually works for Cloud Files with modified headers, you can see a music player here.) But API based header change will be needed (My idea is bizarre - to serve the whole HTML page from CDN instead of the individual components).