I, too, am
very pleased with the speed increases! Thank you very much, Kovid!!
@Dellaster: different libraries serve different purposes.
I have several research libraries I store in Calibre each of which contain several thousand ebooks and which are shared by several researchers via content servers (and available where ever we are world-wide). I will never read them all cover-to-cover - that's not their purpose. Think molecular biology laboratory library - thousands of journal articles + thousands of text books/reference books.
It's silly to assume that everyone's ebook collections (libraries) serve the same purpose.
Troy