Google auto corrects mispositioned touch typing

It looks like it only catches very common mistakes. For example:

http://www.google.com/search?q=dyrn+vr%3B%3B+trdrstvj

That should be 'stem cell research."

to clarify: if you position your fingers on the home keys incorrectly (ie, in my example, I started from the " key rather than ; on my right hand) it seems to realize this and correct it for you.

Could just be a result of their search history / auto correct engine rather than actually writing an algorithm for it, but still, pretty cool!