It is still unclear how Google is making the distinction. Some of those carrying the “blog” label have the word “blog” in their URLs ? such as blogs.domain.com/… or domain.com/blogs/.?? This is true for some of the stories from publications like Forbes, The Wall Street Journal, and The Washington Post. Not all of the publications carrying the label use these formats though.
Returns http://www.nlphypnotherapymanchester.co.uk/uk/fincaadobek376.asp?k376=request-return