Those are real measurements with a power consumption meter. I don't know if it's Power factor corrected though.

I'm using an older first generation C2D, 5 Hard drives (4 magnetic, 1 solid state), 2 4850 video cards, and a truckload of cooling.

When you consider that very few computers will run on less than a 500W power supply, I think you'd be surprised at what a computer can consume. Don't forget the numbers that manufacturers supply you, is what the component consumes at the entry point of the device. A 135W TDP CPU is likely to consume 160W+ from the wall due to conversion inefficiencies.