On their web site they have 1 image of what looks like a series hybrid drivetrain.
You can see the ICE hooked up to a very long generator and another electric motor next to it. That is definitely a series hybrid. But I don't see how they fit bot the drive motor and the generator in the space between the AT transmission and ICE in the previous picture. Yes, there is a big flange in the middle and we can only guess whats inside. But there is no reason to to line up the ICE and the transmission in this way to create a long, cumbersome package unless you were trying to mechanically link them together.
The automatic transmission is vastly less efficient than an electric motor running far outside its ideal RPM range. The efficiency curve of an electric motor is relatively constant throughout out the RPM range and only varies with load.
