I think anyone that exposes their child to 'reading style' computer programs in contributing to their reading. Yet, I think you would need to have. Pretty bright child for them to have the capacity to view and transfer this information into reading. So I don't think it says much about how taught they are. Teaching is not a bad thing if done in the correct way.
We are not a hardcore Waldorf family or anything of the sort as implied above but we have not introduced TV to our 4 year old, or computer or iPad etc nor have we ever owned reading programs.
I simply read to him a variety of different types of books since birth, for pleasure and at 3 he began reading. And by reading I mean confidently reading any text presented. Having the capacity to sound out and understand phonics and sight words.
So it very much is possible to have a truly self taught reader these days but I think the difference between self taught or taught reader at that age does not matter very much. A child who is gifted has the capacity to comprehend what they are reading beyond age similar peers etc.
