DS1 has been identified as gifted (he's 6).
At 3 he was 'odd'...and still is now. He's quirky, and one of the comments that people frequently make about him is that he's like a 'little old man' (in an endearing way!)
At 2 he was referred for speech therapy, and at 3 he was having fairly intensive speech therapy due to very delayed/poor pronunciation...at 3 his pronunciation was more like that of an 18 month old, but his vocabulary was far advanced. This actually made his pronunciation problem appear worse, because he was coming out with things that you wouldn't expect a three year old to.
It was difficult and embarrassing at times, because I was his interpreter. He'd say something to someone, they'd look at me for me to 'interpret' and when i'd repeat what he said the person would look at me like I was crazy and clearly making it up. One example was him telling a little old lady in a shop that we'd been really lucky with the weather because it was sunny, but because of the low pressure zone coming in from the South it should really be raining. She looked at me like I was crazy, and I stopped repeating what he was saying word for word and started being a bit more general
His memory was (still is now) amazing. He hears something once, and know it. If he watches something on TV, even something complex, he could still tell you all about it a week or two later. When he was 3.5 he found an old set of flash cards with animals on them, which was a set of 45. He was messing about with them for about 20 minutes, then brought me the whole pile of them face down, very carefully,, and asked me to test him because he'd been learning them in order. He repeated every one of them in the order he'd given them to me, all 45.
He was very organised, he liked routines and rules. He wanted to make lists all the time and would ask me to help him spell some words, so he could write massive lists...of things to shop for, his favourite animal, the biggest Countries in the World, all the people he knew with green eyes, or whose name started with the same letter as his.
All his toys would be lined up and ordered by size, colour, shape or how long he'd had it.
I have never known any child to get so genuinely engrossed in something. Lots of kids tune out when they're in front of cartoons for instance...but ds1 would do it with anything. When he was concentrating on eating his dinner, when he was doing a jigsaw or playing with blocks, when he was watching the cats play and chase each other...I could be standing two feet away from him nearly shouting his name, and i'd get no response. At times it was like he was locked in his own mind.
He was assessed more than once for autism, and for hearing problems. But they all came back fine. My HV was disbelieving and convinced he was autistic, and kept trying to refer him every few months.
The 'little old man' comments now, come from the things he says. He will make a beeline for ds2's reception teacher and ask how ds2 has behaved in class today, will rub his chin thoughtfully and then say 'That's really good to hear! Please tell me if anything changes'. A couple of weeks ago we were in a pub, waiting to be seated for lunch and the dad of the family next to us had a pint of larger. Ds1 leaned over and said 'I hope you're not going to be driving your car after that, driving after drinking can be dangerous for you and everyone around you' I wanted the ground to swallow me whole. The main thing we're trying to teach ds now is about filtering, how 'facts' can come across as rudeness, and how he can't always blurt out to people what's in his mind, even when it's true. He is getting it slowly, but we've had a few 'But why? Isn't it true? So why can't I say it?' conversations.