I'm sick of reading inaccurate fanb0i propaganda (BTW, nice cover for a Noink troll, just claim you're a "current" Canon user
) like "6FPS with grip" since 2007. No, like the D700 & D300 before it, you not only need the battery grip, you also need a new battery
to achieve that slight increase in FPS. The stock EN-EL3 that comes in the box won't give you added FPS even if you use the battery grip, you have to buy the D3/D4 battery (EN-EL4). Add those two overpriced items up and that is already ~$500, so now even the price delta between the 5D3 & D800 disappears.