You're absolutelly right, just a small caveat for the 60% figure: most well-maintained plants capture between 35% and 40% of heat energy. Peakers can reach 35% too. Pulsed coal and new gas tech can get to 50-60% in ideal conditions. Also, most of these techs are new and are available on recently-build plants. That 60% could be as low as 45%.

Still at least twice as effective as ICEs.

However, a 2-tons electric car compared to a 800kg ICE? without taking into consideration the wear on infrastructure and on singular parts of the vehicle, i still think you are in comparable zone.