the other answer is simply the transfer rate is also camera dependent. different companies concentrated on different aspects of the work flow in the camera. the original D1 was a dog for xfr the canons moved it quicker then the d1x/h played catch up. read this and look at the results. the d1 was designed around a different baseline cf card. the cards the were relatively slow so nikon assumed wrong and didn't think of future speed development. then the speed race began with lexar. as buzz lightyear says "to infinity and beyond". but marketing aside. the still build the workflow based on the average user for the midline models so we might not see much improvement using superduper 24x cards that will get faster every other month. remember- this quarters speed demon is next quarters dog.
[Edited on 8-2-2002 by sjms]