very interesting, out of curiosity which line on this graph is measuring power using a CT vs the meter?
http://pluggy.is-a-geek.com/1hourjuice.png
I'm definitely seeing the same thing regarding the power factor as there are large discrepancies between measuring say a 100W lightbulb vs a 100W computer power supply. I was thinking there has to be a way to measure it more accurately since the folks at "the energy detective" are doing it in a similar fashion. I'm going to start by instead of just measuring peak voltage of the CT which was a quick hack to calculate an RMS value but it seems that still won't get me to where I want to be accuracy wise.