I didn't see that claim made, which is just as well - it's not true.
Gears spinning in an oil bath requires no power? Impossible.

The gear splitting feature is not limited to their product, it derives from the fact that their shallow OD ratio (.78:1) is closer than any automatic transmission's internal ratios.

The power loss through a transmission is NEVER a fixed percentage of power transmitted, and if it were 23% you'd know about it because it would be on fire.