Nancy,
Some day you son will be able to type, and everything will shift!
(Did it for your husband?)
My son learned at age 9. Until then keep working on his ability to tell a story, through dictation, with a video camera, or storyboarding comics, as long as you can keep it fun.
In the meantime, keep those fingers growing with crafts and music.
The anxiety and self esteem are the toughest. It might we worth it to try and explain the differences in how people process information.
I think of VCI and PRI as 'how much electricity' powers a circuit board. The kind that they use to show kids about electricity. Every one has different interests, which is like the doorbell, the light bulb, all the various things that 'do something' attached to the board. The PSI is like some wires being faster than others. (I think that that is wire diameter, not really sure) I'm not really sure what WM would be in this analogy - maybe the solder that holds everything together.
When my son made these at summer camp, the solder was always coming unstuck, so maybe, maybe not...any ideas?
Play that game I mentioned earlier in this thread, not sure how many letters a 6 year old could do, but WOW, DS13 feels so great when he realizes that I can't even hold 4 letters in my head long enough to try out words! Maybe do memory games in the check out line so he can feel good about his strengths...that seems to be a key to self esteem.
It also used to drive my DS crazy when he sees how slow he is in comparison to the other kids but is well aware that he has much more developed abstract thinking. It didn't see fair to him. Now that he's older he realizes that everyone has different strengths. Teaching my son that -actually - life isn't fair, and that he can handle that.
Smiles,
Grinity