Como ya lo había mencionado hace un tiempo los resultados de la búsqueda de dominios en Google fue modificada.
Ahora Matt explica exactamente lo que fue modificado:
Bearing that fact in mind helps explain a recent change in how we handle url queries. Some people call these navigational queries, but at Google a navigational query is typing in [HP] and expecting to see www.hp.com high in the search results. A url query would be something like [www.example.com].
Previously we treated the query [www.example.com] like the query [info:www.example.com], and now we treat it like [”www.example.com”]. The query [info:www.example.com] returns the single url www.example.com if we have it in our index, along with other choices like “see backlinks for www.example.com” (I’m oversimplifying a little, but nothing too bad). The query [”www.example.com”] searches for that as a phrase, and thus returns the ten best matching urls, which will usually show www.example.com at #1 or high in the search results.
Why did we make this change? Bear in mind that you, gentle reader, are not a typical user. If super-duper power-users who know how to refine site: or info: are a set of people we’ll call N, you are probably in that set N. There is a whole different range of people M who just type in www.example.com to get to www.example.com, and who sometimes misspell the url. In math, M >> N means that M is much greater than N. That is, there are many more people who casually type in urls to get to those urls (and who sometimes misspell those urls) than there are super power users. So this change helps M. The N power users can just prepend “info:” to get to the old behavior.