My son, too, took FOREVER to talk!! Even had Early Intervention coming to our house because I was so concerned. He sounded a lot like your son. I knew he wasn't deaf (in fact he'd been having regular hearing tests due to a kidney problem....kidneys and ears develop at the same time and so when one isn't right, they tend to check the other one, too) So I knew for a fact that his hearing was fine. He was and is just so laid back in personality! He took forever to do just about everything....crawl, walk, talk, etc etc etc. And then one day he just started talking. Sounds crazy, I know. But it happened. There will come a point when your son will just decide that something needs to be said. My son started talking with like 4-5 word sentences. He'd just been spending the time absorbing and soaking it all in. If medical conditions have been ruled out, I would just say to relax, keep using your words around him, reading to him, and enjoying the silence (while you can). My son is now 4 1/2 and a motor mouth!!!!! He doesn't STOP talking now!! I have a hard time remembering when he wouldn't talk now!! Be patient. Don't get frustrated in front of him. All in good time....... :)