Jason -
The old & new 7th holes are not on true links land. That land sits well above the links land below that is along the water.
To quote from Rich Goodale's post on the prior page: "The land on which Old 7th and New 7th are based is not linksland. They are raised beaches (as are 1, 2, the first 200yards of 8 and 17, 16 green, and 18)."
The photos in the video show the many rocks/stones in the soil and just how little sand there is in that soil.
DT