The new Canon EOS 1Ds Mark III certainly puts out beautiful large files! But in our first real shoot with the camera we really noticed how quickly those large files can bog down the transfer when shooting tethered! The fact that Canon opted for a USB connection rather than stepping up to a Firewire 800 connection is kind of beyond belief! I would not put it past them to have done it on purpose so as to introduce that in the next camera, forcing us all to upgrade yet again, since we seem to be hitting up against the the maximums of reasonably useable megapixels, they are probably looking for / holding back features so as to secure their revenue stream.
During our shoot once we started to hit up against the camera buffer’s limit we had to simply walk away from the camera and go do something else while it finished the transfer. It will be interesting to see if this becomes a real issue as we head into more shoots.