My DS7 showed no interest in writing at an early age. He didn't even pick up a pencil until he was 5 1/2. He still doesn't really enjoy writing, though he dislikes it less now. Skipping K would have been hard on him.
<Umm, I still help him get dressed sometimes; he doesn't seem to enjoy that task too much either.>
<Though I'm not sure how this feeds into social skills; in kindergarten, he was the one with tons of friends, including at least two 5th graders.>
DD4, on the other hand, has been writing out the alphabet or her random thoughts on her white board for ages now. We had to buy the white board a couple years ago to minimize writing/drawing on the walls. So for her the skip makes a lot of sense.
Val