Oh, do I feel your pain!! DD6 can be slower than slow, and it is painful. Sometimes I feel like just picking her up (which I can do because she's a peanut
) and physically moving her to whereever it is we're going. She can move fast, go fast, do things quickly, if she wants to, and (and this is the big part) if she sees it as something interesting and useful.
Homework is torture! 3 hrs to do something that she can do in 15 minutes if she wanted to! Going to the restroom can take up to half an hour if we let it.
With DD it is all about the brain going so fast that she can't "walk and chew gum at the same time." I think the part of her brain that controls motion goes into slow gear when it is actively pursuing other "bigger and better" ideas.
Sometimes we can make a race out of things and see who can do a task first. She loves to beat me at things like brushing teeth or getting dressed or her finishing her work before I'm done with the dishes. (You get the idea.)
I put it down to an age - body mismatch. If she moved as fast as her brain worked we'd all be in trouble.
