I have no clue...but I was shocked! It wasn't an overtly bright day. And we were shooting in the shade of a huge tree.
Rob, since we're on this part of the subject at hand, did you notice at all that the image seemed to loose dimension (depth) and appear almost dimensionless flat and even almost plastic looking? The Sony cameras we used gave us that appearance and it looked really fake as compared to the HVX200 footage side by side wherein the P2 format media looked absolutely astonishing and full color real although at moments somewhat underlit when indoors with a large picture window (which altogether is my single largest complaint with the camera other than I wished it were about 1# lighter) however the HVX did not show grain if there was even the least bit of artificial reflected light applied (like shooting an Arri 300 or 650 at the ceiling) but the Sony HDV looked horribly grainy under that same scenario and yet blown out overexposed when outdoors which brings me to wonder if it is a camera issue or a codec issue since you are talking about a different camera and yet a similiar situation.