http://www.tomshardware.com/reviews/quadro-fx-4800,2258-10.html
The results from the above link should put a damn end to this Geforce is the same performance as a Quadro in Pro apps for once and for all.
They should show the full results not just final score. The statement "A Quadro FX 4800 moves up to 10 times faster when running workstation applications than the GeForce GTX 280" is quite inacurate. The shading test fps are usualy close to normal cards. In wireframe tests and antialiasing+wireframe tests the diference betwen quadro and normal cards fps is sometimes over 20-30 times. Also large models are usualy runing faster on quadro cards than normal cards.
If u never turn to wireframe and leave antialiasing alone than there isnt such a drastic difference. (which is the reason why some people state the same performance)