Looking at the bearings - its a clever piece of design.
The counter rotating parts don't actually have any interfacing parts e.g. via any bearings - the IP and HP shafts are only attached to the casing, not each other. The IP and LP shafts do contact each other via a bearing but they rotate the same way.
Hence its seems the "three shaft engines with a counter rotating stage have higher bearing speeds than twin shaft"=Internet Myth.