i am a mom of a child with Aspergers. i also have 2 other children not on the spectrum. my answer is based on personal experience that perhaps sharing can help.my son started having some of the quirks you talked about your son having at the age of 2 and half.before then he reached all his milestones early in language,seemed very intelligent,was pody trained early and Never had an accident,but some things that were different were ;he was a little late in sitting up on his own,like 7 mos instead of the average 6 mos. he crawled in a strange way and backwards. he walked at 12 mos but tend to walk on tip toes.we did not put those things together then! was not until we looked back and noticed. like i said he was very intelligent,polite,the best child and baby.My mom and other family members would even say i had it too easy with him!.then age 3 came,and it all changed! hand flapping,repetitive behavior with movies,ect.would  not respond to his name and temper tantrums which was really meltdowns.Aspergers will show up later than autism will.If your child is in day care it will soon be easier to spot.because aspergers is a social disorder,it is very hard to hide socially.if your child seems that he is greeting and speaking in a repetitive or sound like more of a habit,you will soon see.it can take as late as 3 to show up but by the age of 3 any specialist should be able to diagnose.Also,go with your gut,Mommies worry,but mommies always KNOW!eventually..lol the best advice i would give,have him tested by a child psychologist   and put the worries to rest.Best of luck

As a mom of two on the spectrum, and working with kids for the last 15 years, I think if we tried hard enough everyone could have expressed some characteristics of autism.
If you are concerned, talk to the daycare, the pediatrician, and possibly a psychologist. But the criteria is changing so this could change a lot.
I would just continue to work with your son and encourage his talking. All of us have quirks, it's just how severe they become ;)