Their behaviour and how they perform are unfamiliar to the general public which may explain why they haven't taken off that well, plus lack of torque capable though this will change with the introduction of the Torotrak IVT (improve CVT system).
Allison one of the biggest gearbox manufacturers are in the process of taking control of Torotrak.
http://www.greencarcongress.com/2009...n-transmi.html