Never disagreed with thatPretty sure the basic physics of the thing requires that watts dissipated is exactly proportional to heat generated. A more efficient chip doing exactly the same thing dissipates fewer watts. That's what the words mean. Temperature is a different thing. You can have more heat generated with lower device temperatures if you have good heat transfer or higher temperatures with lower heat generated if you have lower heat transfer. Efficiency and temperature are not directly related. Watts and heat generated are basically the same thing.