Evening everyone!

My DD is 13 months old (on the 4th). She is assessed at being closer to a 10 month old developmentally. She just started crawling (YAY!!) about a week ago. Although, she only does so when she reeeeaaaally wants something. She does not yet say any words (not even mama or dada) although she does know who dada and sissy are. In fact, her sister is her favorite person.

She is obviously behind cognitively. She does not understand to do most things she is asked to do although she does know a few such as "turn the page" of a book. She also understands a few signs and actually does more. She just started clapping (somewhat) for "yay!" ...when she feels like it! jaja
My question is to all the parents who have had a child or have a child who is behind like this....
Did your child catch up? Was it a long road and what was it like? What can I expect? I know that each child is individual. I just want to hear from others who have had these developmental issues. Also, any tips or advice on how to really get her motors running would be most appreciated!!
TIA!!
Re: Anyone with a child who "caught up"??
I say she is behind cognitively because she does not respond to most commands/questions/requests. From what I have read she should be doing MUCH more at this age.
The pedi said that she isn't overly concerned right now and that if she hasn't seen improvement by her 15 mo checkup that at that point she will be.
DD was assessed by EI at 8 months because I just wasn't satisfied with "she's fine" which is what I was being told by her doc office. When they assessed her she was only behind in gross motor. However, I requested that the dev specialist come back at 12 months just for a look-see and she agreed with me that she is prob around the 8-9 month mark across the board. Still, she even said that she doesn't see anything sending off major alarms at this time because the most important thing is that you see a natural progression across all the developmental categories (not off the charts in one and another way behind). I agree that she is definitely progressing but I am still worried about my lil gal.
If she is simply following her own time line--GREAT! I just wanted to be proactive because I noticed that she was definitely a late bloomer. It is very difficult (and a little selfish on my part) because there are a few munchkins right around her age in our family right now and they are all right at the average mark. It just makes me worry more and I want her to catch up.
Another question...do you personally believe that DD's lack of exposure to other kiddos could also cause her to be more on the baby side. We have no family or friends where we currently are and she never gets to play with other munckins her age. Thoughts?