Blogging about Blogs

If you look at my blogroll, you'll notice that there are a whole bunch of blogs by folks who seem to blog on company time, and I wonder if they spend so much time on their blogs during work hours, then how do they get any "real" work done? May be they're smarter, or they make the hours they actually work count more, or they just type on their computers feverishly pretending their busy. :-)