Yes a lot of times, with boys, they are slower in talking. There is a gender difference. It's very common.
My son, since about 20 months old, has been getting speech therapy. Not because he is developmentally off, but simply to help him along with his speech.
You can contact your local regional center (or the Pediatrician should know where to call), they offer this service for free (up until 3 years old), and they come to your home. They do an overall assessment... full spectrum, and then suggest what can help the child. My son was even ahead developmentally in many areas...except for his talking. So since it's free, I figured why not?
There are many ways to approach this:
1) the Doctor is not concerned about it, and that's fine.
2) The mom is not concerned about it, and that's fine.
3) the child is fine...but is not yet talking as compared to others his/her age.... so, you then (a) get speech therapy or, (b) you just continue waiting to see if he, on his own, increases his speaking skills and vocabulary.
Why did I get Speech Therapy for MY son?:
1) it is free
2) It can't hurt... if anything, this will provide him with "skills" to then learn how to form his sounds/his words and increase his "confidence" with talking....as he was shy about it. (I have learned that forming words vocally takes a lot of different coordination of the mouth and tongue and front and back areas of the mouth... which the lay-person would not know).
3) They can provide ME with skills as a Parent to help my son.
4) There are a LOT of tips they provide you and the child with... and I have seen a MARKED improvement in my son... which may not have happened if he was not getting speech Therapy. I find it useful and very pertinent.
5) My son enjoys it, and KNOWS it is to help him talk... he is quite proud of his progress and shows us what he learns. For the entire time his Speech Therapist his here, he listens totally and follows along with the activity exercises.. he knows it is not time to just fool around. He gets a lot out of it too.
6) My son is also bi-lingual... so he is doing twice the work, for just learning to "talk" and sound things out.
For me, I figure, it can only enhance and help my son's ability. He has what is called an "expressive speech" delay... which is what a lot of kids have. It's very common. Now, if I were a Mom not getting assistance with this... then that's fine too. It was not "MANDATORY" that my son get speech therapy... it was "optional" at his level. My Pediatrician was not "alarmed"....but said that it can help, and yes also some kids just will talk later. But, I CHOOSE to do this for my son, seeing many positives about it, and I think it helps a lot. And many women I know, said that their child just started talking a lot from about 3 years old, and they didn't do anything. Just waited.
So, you can approach it in different ways.
Main thing being, that his Mom and/or Dad... decide, and get their Pediatrician's opinion. Many 2 years old do not listen anyway...so this is not an indication of speech.
All the best,
Susan