I think this article, and probably many of the comments, shows how little people understand of how the ratings and broadcast networks' business model works.
The "family" has been dead for years, ratings-wise. The only numbers that count -- at all -- are adults 18-49, and within that group women 18-34 are particularly valued. That's why singing and dancing competitions rule the airwaves. If you are under 18 or older than 49 your TV viewing habits do not matter to advertisers, they do not matter to networks. An 100 million kids could watch a prime time TV show, and it will still get canceled if not enough adults are watching.
Why? Because TV networks do not have viewers as customers, it's the advertisers that pay their bills. And the advertisers have decided that those are the only age ranges worth selling to, on prime-time TV.
Online, DVD sales, international sales do NOT bring any revenue whatsoever to TV networks, and no matter how popular a show is off of a US TV set, it is worthless if it does not have an high rating in the key demo. Unless -- and only, unless -- the Network is also the production company for that show. (but most are not) Production companies do make money from DVDs online purchases, rights and online ads -- so a company (such as amazon or Hulu) can bypass the Networks and produce successfully online, as is now happening.
I do disagree with the advertisers age ranges, and feel they could monetize the younger and older audiences as well. But I do also understand why they feel they can reach these audiences easily without any need to pay for expensive TV ads.
We are probably reaching a transition point in TV viewing anyway. A business model like the MLB.TV model is one that probably works best. A worldwide 24/7 online TV channel paid for by subscription and/or advertising. It provides full demographic info in real time, allows one-click purchasing to firms, and it allows for long-tail and niche programming too. That is a much better model for advertisers and viewers -- but not too good for the network middlemen, unless they jump on that bandwagon right now.
As an aside, similar is true for movies -- which have a totally different demographic (12-24 usually). Long, long gone are movies like "The Sand Pebbles". Why? Because adults do not go to the cinema in sufficient numbers to matter, unless they are taking their kids to see a kids movie. There is very little overlap between TV and movies in terms of significant audience. Movies are only for children, and TV is only for adults these days (and female adults mostly too, since men are easy targets through sports).