here we go again.
Come one, share the horror stories.
Which is not correct on the calculations? Or may be you did not read the explanations on how they are done?
You're just about the only person saying its correct. Since you own the site, ofcourse you're not going to say otherwise.
So far for me not a single calculation on the site has been correct, or even close to correct.
I would say the hashrates reported for each video card are pretty accurate. Then about the calculator, it's like for any calculator it's an approximation/best of luck calculation...it's impossible to be 100% accurate, but it can give an idea what would be most profitable for you to mine at that moment. Then you have to verify it with your rig. Why so much anger? You don't even pay anything for it...