How accurate are these PSU calculators?

Can any computer experts take a look at these PSU calculators and see if they are accurate?

http://www.extreme.outervision.com/psucalculator.jsp

http://web.aanet.com.au/SnooP/psucalc.php

>>5
OMG REALLY?  SAME PERSON?  OMG YOU CAN READ IDs?  WOW!!!! YOU ARE SO FUCKING INTELLIGENT

>>1, >>3
>>5 is a case in point for the point I made in >>4.

Oh, and kill yourself.
You too >>5.