This is true. This is why we decided to set it as http://blog.dawdle.com instead of http://www.dawdle.com/blog . We have some freelancers that want to write about gaming in general (so they might get a callup to get paid), so it's editorially independent, and the blog can pass independent PageRank to the main http://www.dawdle.com/ domain.

The point is: don't automatically just shove everything in subdirectories; think about if you want your subdomains to have independent PR or not - it might make sense in certain situations.