The headline (the link) isn't totally accurate to the content of the article.
It's true that blogging is less relevant to young people, who favor rapid fire social media like Facebook and Twitter,but
"While the younger generation is losing interest in blogging, people approaching middle age and older are sticking with it. Among 34-to-45-year-olds who use the Internet, the percentage who blog increased six points, to 16 percent, in 2010 from two years earlier, the Pew survey found. Blogging by 46-to-55-year-olds increased five percentage points, to 11 percent, while blogging among 65-to-73-year-olds rose two percentage points, to 8 percent."
And it's true that blog readership in the U.S. has slowed, but
"Blogger, owned by Google, had fewer unique visitors in the United States in December than it had a year earlier — a 2 percent decline, to 58.6 million — although globally, Blogger’s unique visitors rose 9 percent, to 323 million."