Four things in four seconds?

Julia, from Hooked on Houses just got back from BlissDom, which is a huge meeting of bloggers for bloggers, and she wrote a little list of what she learned there. The thing that shocked me the most is that, apparently, most visitors stay at your blog for an average of only four seconds. Four seconds!!! Is that right? Because if it is, that means I am spending far too much time writing my posts!