Yeah, my daughter went through a "dammit" phase when she was 3. What was really funny was when she said it when I was THINKING it, but didn't actually say it. A couple weeks ago we were walking along and a garbage truck whizzed by, quite fast, and very close to the curb of the sidewalk. "Wow," she said, "That was freakin' scary!" (She's 6 now, and yes, she said "freakin'", I'm not editing it.)
My favorite, though, was when we did paperwork for summer daycamp last year. I was going over the rules with her and one of them was "Swearing will not be tolerated." "Dad, what's swearing?" "Swearing is when you say bad words that you're not supposed to say." "Oh. <pause> I guess that goes for swearword fingers too!" and she sticks her right middle finger straight out at me! I couldn't decide whether to collapse on the floor laughing, or point out to her that that finger is supposed to be presented in a vertical position, not horizontal.
Oh, and I agree about the art. My daughter couldn't draw a plane like that, but based on the wall-hangings at school there are 3 or 4 kids in her first grade class who could, so I'm sure it's reasonable for an 8 yo. (I won't base it on myself, because I can't now and never could draw anything recognizable.)