Bodiddly - my DD1 is 2.5 and very patiently shows her brother, (six next month) how to cut up his food. His place at the table and the wall behind it regularly looks like a CSI crime scene. At least once a week, he forgets which hands to hold his knife and fork in.
He could write his name before he went to school at 5.5 here in Ireland, and he could recognise numbers, and-randomly-all the major politicians in the Sunday papers but he point blank refused to learn letters. DS enjoyed the 'puzzle' books in the middle of comics at your DS's age, but he would try to make a battle of it if I tried to teach him at all.
When we had a parents' evening last week, his teacher said his speech and general progress is exceptional. His reading is fine but not exceptional and this is because he's annoyed he can't read fluently at the first attempt. He tries to do his homework reading the words side-on because that's often the way I read to the DC myself ... Also, he just can't be bothered with it at the moment.
He is v. sure that there really are aliens leaving signs in his school yard, and they are his main priority.
I suppose what I'm trying to say is that letting him play, and spending your time with him doing unpressured stuff sounds fantastic. And they'll all be good at different things, and resistant to things in ways we can't predict. Your DS will at some stage master cutlery and reading, but he won't ever regain that unpressured time.
The other thing is that small boys often just don't set their priorities for development in the same way as their mothers and teachers do.
I know DS's friends were 'taught' more before school, and can eat without redecorating their houses, but I take what my mum would call 'plenty no notice.'