It seems unlikely that most or even many children can skip 6 years. A lot could skip 1, I think most homes hooked bright kids could skip 2 (if they had enough attention - I'm not sure the time wasting prevention arguement works if you are one of 6 kids under 10 including 2 year old triplets (there seem to be some very large families on the WTM boards. I do know as a child the time wasting really annoyed me and I am MG at best.