I got my D600 last week. I purchased a Sandisk Extreme Pro SDHC USH-1 Class 10 card, and even with that card, when reviewing images the camera seems to hesitate when pulling up images. Not that it's a long lag, but compared to my D300 it is much slower. On the order of 5 to 8 seconds before an image is displayed. I know the images are larger than the D300, but the lag was simply unexpected with the Expeed 3 processor and fast card.
Is it instant for anyone else, or is there a lag time when reviewing images.