There is an important distinction here. Your camera was able to use F1.4 to focus even if you weren't going to shoot at that aperture. had you been using an F2.8 or F4 maximum aperture lens (as many D600 or D7000 owners might be) your success rate would likely have been less high on both the D7000 and the D800.
>I used a D7000 which is less capable camera in low light for >AF or noise, and a D800. The D800 is just a little better than >a D600 AF in low light. What is low light? 1 stop underexposed >required f/2.8, 1/125 and ISO 25k! I had the option of f/1.4 >but most shots were of two people or more so even 2.8 was too >narrow of DOF.