Just to give a little input into this discussion. My eldest child a boy was born in 1969. He always had quite terrifying tantrums, and when he was crawling this would involved getting himself over to the fireplace curb, where he would bang his forehead until bruised. By the time he was coming up to four years old, there were two younger siblings, he was clever and was reading quite fluently by that age. However, the tantrums continued and I did actually use the 'Autistic' word to a social worker. It was dismissed out of hand, as, back then, autism was allied to non-verbal, etc children.
He always had some very strange behaviors, but did manage to grow up without any extra assistance. I did manage to get him a scholarship to a local public school when he was due to start secondary school. Even there, some of the teachers were concerned at some of his strange behavior. But he passed his A levels, went on to uni, eventually got married and settled down. He has a good job, and the whole family can recognise so many aspergers traits (on his 40th birthday, he walked out of the restuarant, when the waiters brought out his cake and started to sing, Happy Birthday). However. I am so pleased that I never went ahead to get him a 'label'. Would not have helped him in any way.
On the other hand, my eldest Gs showed serious Autistic tendencies from a young age, this effected him both at home and at school. (eg: big lad, at infant school was often in trouble for punching other children in the playground. Eventually discovered that he HAD to be No. 4 in the line-up to go back into class). His diagnosis has helped and he eventually attended a special school for autistic children for years 9 - 11, where he passed his GCSE's, and was taught so much how to manage his condition. He is now at his local 6th form college doing his A levels.
So, what I am trying to say is that it is not always good to label a child - sometimes that is necessary. Many people have certain behaviors which are on the autistic spectrum, but this does not mean they need any label, diagnosis or special treatment.
As has been said by others, give this child time, and see if the professionals in the nursery feel there is any need for any sort of further intervention.