He sounds fine, every single child is different and remember guild lines are just that..a guide, and where a child falls on that guide is completely different.
My oldest has a severe speech, language comprehension disorder. He did not learn to talk till he was closer to five, kinder age. His language comprehension was even worse. This did make me a little more paranoid with my other children. He is the oldest of 8.
All of my other kids did not talk till they were 2 or a little older. They understood about what your little one did at those ages. My seventh child spoke at 19 months, and my last started at 15 months, but in my house if you want to be heard you need to speak up lol
I will tell you this much, from very early on we knew that something wasn't quite right with my oldest, I did have a bit of denial and it was very clear by about 15 months. My problem was, 20 year ago nobody would work with him till he was at least 2 1/2. I got lucky and the shriners took him in just before his 2nd birthday. I always tell friends that if they are questioning it, things are most likely okay. Momma instinct is very strong, you would feel it if something was off.