The card write time is irrelevant even if the technical write speed of the card was that low (which it isn't). Before the data is written to the card its written to a buffer built in to the camera, the buffer doesn't fill up till several photo's are already taken. So CF Data write speeds are only relevant when you shoot a burst of some 20+ photo's in 4 seconds (overflowing the data buffer). 16 gb is HUGE too, it will take you a long long time before you fill that up. The only time you'll really notice the data write speeds will be when you transfer the shots to your computer. That 16gb is fine, the $5 1gb CF Card at wal-mart is fine.