Quadro 5000 "Fast Double Precision"

nvidia goes out of their way to describe the C2050 DP performance as 515 GFLOPS max, but they are silent with regards to the other Fermi based Quadros (5000 in this case). Does anyone know the Quadro 5000 DP performance and how it was tested? I can’t hang my hat on “fast double precision”. The lack of detail makes me think the Quadro’s have been hobbled.