"Tell me is this endemic to D600s and Hi Res Sensors. Do the Canons have the same problem?"
Unless it is well sealed, dust will infiltrate into any cam with a digital sensor that has removable lenses. As a photography workshop instructor, I have even seen it appear in the images from compact Point and Shoot cameras! The reason is the telescoping lenses on many of them, which allows microspic dust to enter via the gaps in the lens barrels as they move in and out.
I've had dust on all 4 digi cams I currently own, including the D200, 300 and two D700's. I use a lens blower following the techniques outlined above which works just fine. To date, have not had to use any other dust removal procedures.
One last point. To really see the dust in images, enlarge them to 100% in your favourite image processing software. The healing and clone tools in Photoshop Elements and CS do a great job of removing any dust that remains.
Save yourself bum time in front of the computer, by doing regular sensor cleaning, just as you would regularly clean and maintain your valued lenses.