Is the paragraph dead?

This morning I was doing my regular online news circuit, and reading a printed magazine copy of "Canadian Business", when I noticed an interesting difference for the first time: Online news & blogs don't use periods to end sentences any more, they use paragraph breaks.

I opened up an article about the Bhutto assassination, and found that 24 out of 34 paragraphs had only once sentence, the remaining paragraphs had two.

Meanwhile, my Canadian Business magazine had 3 - 5 sentences per paragraph, with no spacing between them.

3 - 5 would be in line with what I was taught in grade school about writing, however that was pre-internet.

I suspect that the reasoning for doing one sentence per paragraph is that it makes it easer to read in narrow 600 pixel columns, and you don't have to worry about extra paper costs like you would in print.

There are a number of other ways that writing style "rules" have been changed by the internet since I was in grade school:

• Referencing authors is no longer required, simply provide a hyperlink
• There's no such thing as a word count, use as many or as few words as it takes to get an idea across. When I started reading blogs, my mind had to get around the idea a 100 word blurb might be just as valuable as the 600 word one-pager in a typical magazine article.
  
• Feel free to completely omit any background details on the topic you are discussing, even if it is very recent news. If your reader wants to know more, the answers are just a Google search away.
  

I find it interesting that by modifying the media (from print to screen), that the rules of grammar and writing style get modified as well.