My last was a late talker, but I attributed it to his being so much younger than his siblings and having so many interpreters that got him what he wanted with just a point, grunt, etc. He also walked late, preferring to crawl. We even got him x-rayed to make sure there were no developmental issues with the formation of his joints, etc. that prevented him from walking.
He has dysgraphia, and those was actually an early sign that I didn't recognize.
Trust your gut. If it bothers you because it doesn't fit with everything else, pursue answers.
