Dyspraxia has been mentioned lots of times with my son. In his case it doesn't seem to affect him verbally or at least not nearly as much as it does in terms of his motor skills.
I think I'm dyspraxic too actually. I've got a terrible time learning things from watching and actually even coordinating new motor movements altogether. I remember a terrible start to school because I couldn't skip and those sorts of things (and writing, and cutting). I am an excellent swimmer

but have unorthodox technique becuase I just can't coordinate things the way I was taught. Didn't stop me from being recruited for swim team. I think Andrew is going to be a good swimmer too so find that mentioned here interesting. In general though I found learning motor skills very frustrating and demoralizing growing up. I hope I can spare Andrew some of that somehow.
I guess I need to research this more.
My son's developmental therapist had a son with severe apraxia of speech (affecting all mouth movements including eating/swallowing) but excellent/above average gross and fine motor abilities. My son has dyspraxia of motor movements but his speech movements are good. I mostly wanted to say that I think there may be over-lap in some kids but speech isn't always affected and I suspect that some kids speech is the main thing and not motor skills.