Hi, not that I am much help but my DS1 is exactly the same, he has just turned 2, and we have had him evaluated by speech therapists and paedetirican as I was so worried and they both said it will come, but definately a positive thing he understands... I also think he is defiant as when he makes some sounds/attempts at words I give him loads of praise and then I try to get him to do it again, and he just grunts...we get much more success when we just don't comment! DS1 is getting reviewed again at 2 and half, to see if there is any improvements! x x x