What I dont understand though is that the camera takes two different cards ..... I can see some people using the cards as over flow but it makes more sense to me to use them as back up for that one in a million chance of a card failing and loosing all your photos.
So if the XQD card is so fast how does it work when you are writing to a very fast XQD card a much slower CF card at the same time ?
Is that in itself not slowing down your camera speed down to the CF card speed ??