Good point.
But maybe those USD estimates also include VAT? If not, it's also incorrect to compare that with the $400 price tag.
In the US sales tax isn't added to the listed price. So the final cost'd be $400 + (tax).
Are all this problems and questions that makes me think : "How can someone estimate the price of a console? Only Sony can estimate this":
That's sorta CarlB's point, that most of these analysis are bogus to begin with.