I'm a devout google fan! I use it to search even within MSDN and weblogs.asp.net but lately I had an incident which made me think that google is missing out results.
I was searching for Dr. Altamash's MIT thesis on Google with the following query.
http://www.google.com/search?sourceid=navclient&ie=UTF-8&oe=UTF-8&q=mit+altamash+kamal
To my marvel, it returned me no pertaining results. However the simillar yahoo search
http://search.yahoo.com/search?p=mit+altamash+kamal&ei=UTF-8&fr=fp-tab-web-t&n=20&fl=0&x=wrt
which not only displayed link to his thesis but also the theses.mit.edu Digital Library Index Page.
It made me wonder if google is dropping ranking in quest of being sophisticated and context sensetive?