My ds is now 3y6m, did not start talking till 2y9m, still a bit behind on the language, but coming on leaps and bounds since new year and surprises me with new things all the time. He had a developmental test, similar to mum2fred at 2y7m, and found to be behind more so on both socially and communication and a few others i forget, but ahead visually. He is v. loving, laidback, thoughtful, good at sharing, funny (like to make us laugh), loves company, loves playing dotty dinosaurs (a dice throwing games), dinosaurs, cars, and imaginary play is not bad (e.g. being doctor or patient, racing driver). Yes, he has only recently started lining things up and licking everything, and recently has real problems with sound (hearing sensitivity), and he is high functioning autism, still no firm dx, but will do, they say it, but will not put it into writing. My ds tells me, his the best boy in the world, which i would agree. It's a long process, but i have found so much info on this forum to help and support. If there is anything there, to be found now gives both you and him the best start.