I really, really want to quote this study by Mom Central Consulting to highlight the influence of mommy bloggers but where are the technical details? Did they work with a respected fieldwork partner or was this a survey of moms they knew? Did they make sure the sample was representative of all moms or were their respondents biased in some way? When was the survey conducted? How many people did they interview? Presumably the interviews were conducted online but there is no indication.
And what about their finding that 84% of moms visit blogs to "read authentic content about topics that interest them". Ever heard a mom use the words "authentic" and "content" in the same sentence outside of a marketing department? These questions were written from the perspective of the marketer, not the audience being surveyed.