This shot, also from the screening, typifies the stylistic difference between films of that era, and later eras. Note how warm the image is, overall. It feels like the '70's. We would never time images this way, today. Plus, it has to be noted, that our projector bulbs are of a much cooler color temperature today than in the 70's, making for much bluer (arguably truer) whites.
This screening was done with 70's era bulbs on a 70's era screen to recreate the experience of its actual projection when it first came out.