I second that. In fact that is exactly what I was going to write. Also, speechdelay.com was a lifesaver for my nerves. Try it out. But dont get too hot and bothered about what other people's kids are doing or are not doing. My own son who is almost 2.5 still has only a few words but his cognitive ability is much much better.
After asking questions and reading forums on teh internet, i was convinced my son had every possible speech problem and more, including autism.
Your child is still very very young and kids change so quickly. Speech delay is far more common in boys than in girls. I would also say that "they", i.e. speech therapists, etc, dont REALLY know what causes speech delay and for that reason many things might be considered regarding your child. Dispraxia, apraxia, PDD, autism, Autistic spectrum disorders, the list goes on and on and on and on.
Some children are diagnosed with a number of "disorders" and I believe that this reflects the fact that they really dont know what causes the delay. The brain is a magical thing and we have only learned so very little about it.
Most of all keep on enjoying your little one. Dont get yourself into a worry frenzy and miss out on these wonderful months. Learn all you can though before having your child assessed so you know what to ask and can understand what is being said to you if they use medical jargon (which can be quite daunting).
My son is attending his first assessment tomorrow and I will let you know what to expect.