The only thing that concerns me with those bench numbers is "how" did they rate the amp? Was it rated with a single frequency, such as a 100Hz tone OR did they rate it with all frequencies that the amplifier was designed to produce? I would be willing to bet that they picked a single frequency for the bench numbers and chances are it is a frequency that most users won't even play through their amplifiers. After all, who here runs their subwoofer crossover above 100 Hz? Oddly, that is the single frequency that most bench testers seem to choose

Then, we also have the question as to what resistive load did they use? If they use a reactive load, such as a subwoofer, the impedance rise will get them at 100 Hz. A non-reactive load, such as a constant dummy load, remains consistent and this alone should negate their numbers because it is not a "real world" situation.