The rumour is not quite right.
Oxford has produced, in conjuction with Transair, a CD-ROM series for PPL. It covers the PPL syllabus at a good level of depth, including much, but not all, of the ATPL syllabus. All of these discs have been written by the OAT ground instructors.
It uses much of the material from the Oxford Jeppesen manual and will teach it in the same way, probably using the same diagrams. But it is not a ATPL course - and, by the way, the CD-ROM runs itself. It doesn't use Powerpoint.