Hi there, my ds, who will be 3 in a couple of months, started speaking quite early and stringing sentences together soon after. I think his vocabulary is very good - as good as my 5 year olds almost. Because he is advanced in comparison to my dd, we have never worried about his speech. However, he does mispronounce certain sounds, mainly when the second letter of a word is 'r'. So, preschool = treschool, brush = drush, cream = tream, quick = trick. I know he is quite young still, but do I need to be worried about this?