The problem with photographing terra is that when light shines on the material, the pictures come out more orange. When ambient light is darker, the material looks darker.....when bright light is shining right on it, it looks brighter, especially in pictures. Both links are accurate, although the dash isn't as bright as in the second link.
I had the exact same concern as you when I ordered my deep sea blue/terra X1, and was greatly relieved that it was darker looking in person. When I look at the seats and dash, orange doesn't come to mind. It's more of a rich brown.
I'm really surprised I don't see terra more often.