So semantically, even if there where a traditional TOC, it does do tell you where to go. Pragmatically, you navigate via link, and can not move easily to this position as you would using a printed book by thumbing to the position. You could though, if supported try scrolling to this position, but you have no true means of orientation.
Sorry, but I think we are talking past each other. By a "traditional TOC" I mean something within the body of an e-book at the traditional location of a TOC which has the appearance of a traditional paper book TOC, but which has been augmented with hot-links, such that clicking on say a chapter title, or clicking on what was the traditional paper page number, results in vectoring the reader's reading page to that location. About half the TOCs one sees within PG have such hot-links, the other half are simply static renderings, or are not provided at all. As opposed to say an NGX, which kind-of presents TOC information "on the side" IE outside of the normal reading experience of reading a book. Again, in early EPUB efforts one often saw EPUB e-books which included both an active hot-linked "traditional" TOC within the body of the book AND an Adobe Digital Reader NGX "TOC" "on the side" resulting in the appearance of two separate but slightly different TOCs in one book -- which looked stupid. With the result that the EPUB ebook publishing community seems to be heading rapidly in the direction of including the Adobe Digital Reader NGX approach "on the side" and excluding putting a "real" copy of a TOC within the body of the text -- even if the paper version of the book originally came with a real TOC in the body of the text.