DS(2) started pre-school a month ago. I had a catch up with his key worker today to talk me through her initial assessments of him.
She has absolutely no concerns whatsoever - he is reaching all of his age appropriate milestones, and exceeding a few of them. She was a bit worried about his speech but he has caught up so quickly and is starting to use five-word sentences more regularly (he is 3 in six weeks).
I know none of this sounds exceptional, but -
I adopted my son just after he turned a year old. He was removed from his birth mum at birth, born at 32 weeks and spent the first weeks of his life in NICU. He has been through more in his little life than I would ever wish on my worst enemy, losing everything he has ever known and starting all over again. He even nearly moved in with another family who then "changed their mind" about adopting him just before his first birthday. He had been through introductions with them for a week and they decided not to bring him home on moving day.
I feel so overwhelmingly proud of him. He has overcome so much and to be told how he is thriving, how settled and happy he is there when I cant be with me, just makes my heart melt.
I've name changed since but here is my first post about him nearly two years ago...pleased to report I am still just as obsessed with him as I was back then 
www.mumsnet.com/Talk/mumsnet_classics/3136219-To-tell-you-about-my-first-night-with-my-son