Underscores vs. Hyphens… Google’s Thoughts?

After finding some weird results in some SEO work, I had come to notice that underscores in urls didn’t seem to be treated as "word separators" in Google.

Although I had never actually done any sort of a study to confirm my suspicions, that is just A-OK, because I found a test done here that is worth reading and goes over the exact information you need to know.

To sum it up, google treats dashes (-) as a word separator, however google treats underscores(_) as nothing….just treats it as part of the word.