Originally Posted by MisterMax
Yes, this help, but this is not the whole story.
It doesent matter how small the single html file are in an epub, in my experience event an optimized epub will always be slower than an kepub.
Maybe that the kepub contain some kind of structural information that help the Kobo to render the page faster...
I didn't try any regular epub since upgrading to 2.0. I used the method (a little lengthy and potentially dangerous) describe here
About splitting the ebook: I usually split files/chapter. This way it's easy to have a link between the TOC and the actual files and it also gives an accurate page count.
Anyway, what I'd really like to see is either epubs supported as kepubs or, lacking that, an epub to kepub conversion tool.