"heading. My common usage understanding of the word is that it means statistical information about something, or the study thereof. My own 1990 dictionary says demographics: data resulting from the science of demography, and demography: the scientific study of human populations, especially with relation to their size, structure and distribution. So on that basis, the articles would be correctly titled 'demographics of...', and quote lots of statistics. It would appear to me that, according to my quite large dictionary, the article is wrong in its definition of these two terms. At the least, it should explain that there is a possible different understanding of the terms.
My own interest was how broad the term demographics is, and whether when discussing a population it would include information about the land area, climate, how wet it is, all that sort of stuff which undoubtedly affects and influences the people living there, even though it might not be the sort of information collected by modern advertising executives. I suspect that a difference in understanding of the terms has crept in because such people are only interested in a subset of the total information.   
 I completely agree with you dictionary. However the key phrase is ""the scientific study of human populations"". Once human population is no longer an essential part of the study (as in climate, landmass etc. which will be the same regardless of population) it is no demography; I do agree that if climate has an effect on the population (e.g. in the arctic region people tend to protect themselves against cold) it is interesting from demography; but without such reference not.   

Non-families

I notice that a lot of Wikipedia articles use some sort of template putting households into four categories: ""had children under the age of 18 living with them"", ""were married couples living together"", ""had a female householder with no husband present"", and  ""non-families"". These categories do not add up to 100%;, for examples see Downers Grove, Willowick, Ohio, etc etc. Any ideas about where this came from, and how it can be addressed? It seems like a category generated as part of a marketing strategy. Novickas 

Generational Cohorts
Are those born during the brief 1977-83 period generation-less?

That's exactly what I was thinking what's the deal??  I'll quote below

""Generation X cohort (born from 1965 to 1976) 
Memorable events: Challenger explosion, Iran-Contra, social malaise, Reaganomics, AIDS, safe sex, fall of Berlin Wall, single parent families 

Key characteristics: quest for emotional security, independent, informality, entrepreneurial 
Generation Y cohort also called N Generation (born from 1983 to 2007) ""

Seems to be years 1977 through 1982 are wandering generation lost. )

I was recently at a business conference and they where talking about the generations and they referred to the N Generation as the milenials, or the milenial generation, those who haven't known a time before the computer"