Great picture! The Turkey Vultures I see around here seem darker, the feathers that look whitish in your picture, are a subtle silvery grey. I never get to see them that close though. They soar over me, and I can just see enough to say the flight feathers are lighter.
I've been paying closer attention to them this year, and I still think I'm seeing juvies, with black heads. I have seen adults, but never seen them in the open winged pose. I've seen them hanging out quietly on the fence around a local dairy farm.
I don't know when the camera will go live.