DS had maybe 5-6 words at that age I think. We did baby sign with him so he communicated very well, just not verbally.
By 2 he was a veritable chatterbox and hasn't stopped since, so I wouldn't be too worried about it just yet.
Interestingly, he didn't sleep much in the first 2 years, so maybe you're on to something there PollyA.

I'm sure if you compare your girl to those other mums' kids you'd find things that she's very advanced in compared to them. DS' language is excellent, but his gross motor skills are well behind those of some of his peers. It's just not such a priority for him.