Singular Search + Plural Search = Yahoo and Bing
On Google it does not do that. However, I know some of you think Google Instant will not affect SEO or micro niches, but I think it will. Why? For example, one of my sites is generally more optimized for the plural version (exact keyword domain). I show up on the 2nd page for the singular version. Well, if you Google the plural version, the singular version is what pops up first on Google instant. So I think that will hurt me for people who do not want to continue typing.
I am a newby, so I realize this might not be a big deal. I guess I am just trying to figure out how to choose micro niches if that is what happens.