Not sure it's worth looking at these sorts of research with anything other than interest, as the results are so varied. Better to know yourself, your family, your child and make decisions about childcare (if you go down that route) with care. But do you know what - I have never met anyone who did not put care and effort into their childcare arrangements, or if they weren't working out, changed them. I have yet to meet anyone who found a nursery or childminder, checked the last Ofsted and thought, OK that'll do.
But I'm also not sure why anyone would really belive that the majority of people who provide childcare are "highly qualified, strictly regulated and genuine caring people". We all know that childcare is a low paid job with few career prospects. There are of course highly qualified childcarers, but a)do they need to be (I mean if we think mums are the best, are any of us qualified?) and b)what do we mean about highly qualified? I don't think an NVQ really counts (useful though it may be). It means some training yes, but highly qualified? (I work in health and would assume post-graduate or specialist qualifications). As for caring, well it's like all jobs that involve personal care, some people do it because they really enjoy it, and some do it because it brings home the bacon. I can't see why anyone should assume that a nursery worker is any different from anyone else.
I have used a nanny, a nursery, a childminder, my husband (used!), and cared for the children myself. Oh and the children are at school now. I think they all had their ups and downs, but I certainly know that the time the children spent with me was NOT the best option! The children speak about all their carers with affection (dd particularly reminisces about nursery, and there are great hugs whenever we bump into her nursery teachers, even though she left three years ago now).