I'm not sure if the original poster says that nursery would help a child with a speech delay, but rather asks if a child who stays at home with mum or dad has a better chance of speaking earlier compared to a child who is in a nursery setting. In my experience and my friend's, I would not make that assumption.
I have a son who has a severe speech delay and he has always been with me at home, together with older brother, who spoke at a very normal age and has an amazing vocabulary. At 2 and 5 months DS2 had only two words and was not babbling (he couldn't say BA or BOO or WA or TA, there were NO sounds except MMMMM). Now, at 2 years 10 months, he has well over 500 words and makes sentences - now can say two sentences that complement each other (such as 'look a fire engine. Fire engine at traffic light'). His speech is not very clear but it should sort itself out with help from us and from therapist.
I personally have never felt a competition between my and the other mums because of the speech delay - but I was worried that my child's delay had a more serious underlying cause. He has been checked by many professionals and his only delay in development is his expressive speech (there are broadly two types of speech delays, expressive - inability to produce speech and receptive, difficulty processing the words heard. They are both brain development issues, and no matter how much I was talking to him he simply could not express the words).
Anyway, I can honestly say that his speech developed after:
- starting weekly drama sessions!
- starting a pre-school 2 mornings a week
- DS1 starting nursery five mornings a week
- group-based speech therapy
- letting him watch the stupid bbc program 'in the night garden'. One of the first thing he said was 'me me me me me' like the little pontipines...
Would his speech have developed differently if in nursery? probably not. Would I have felt guilty about it and blamed me having to work and the nursery environment? Yes, probably!!!
Anyway, my point is that a child staying at home with a parent doesn't 'prevent' a speech delay, neither does going to a nursery. It is mostly due to a brain development issue (except in extreme cases when babies are not spoken to at all). I spoke the same way, same amount to both my children, and I talk a lot.
Final point, sorry about the long post, some people ask me what's the rush, why are you worried about his speech developing later? My answer to that is I would like his speech issues to be 'solved' before he starts school. I think that there is a big link between the ability to express yourself and confidence, and I would like him to remain a confident and happy child. I don't want him to be unhappy at school because he can't express himself.