... Compared to the 1D4 in identical circumstances the 5D3 knocked my socks off. Where I managed to keep sight of the AF point the keepers rate was way above my expectations. If we had the red AF points visible, the only lost shots would have been from motion blur. I was astounded.
So what a pity Canon has set this camera up with such strong AF and all but murdered it's usability. Cancel the 1DX pre-order? It's a tough call...
You've just confirmed my fondest hopes and my worst fears.
The 1D4 does a great job overall for my dance work, but I lose too many shots to imperfect AF when the dancers are dimly lit and wearing low-contrast costumes. By all accounts, the AF system in the 1DX is brilliant in low light ... but if one can't keep it trained on the subject, it's useless.