I'm not surprised because I have heard that people use Google in this "asking a question" way (I'll call it the "Ask Jeeves Technique"). None the less it still feels odd to me. This is because when I am searching for an answer to a question on Google, I will usually type in a portion of the answer that I feel would be predictable, To take a random example: "The population of Iceland is" (with actual quotes so as to pick up the whole phrase). I don't have a name for this technique (perhaps "Answer Prediction" or the "Reverse Ask Jeeves Technique"), but I usually find it works to my satisfaction. Otherwise, I'm like you, I type in separate keywords that don't make a complete sentence.

I have theorised in the past that perhaps the reason some people use the "Ask Jeeves technique" while I and others might use the "Answer Prediction" technique might be due to me having a clearer general understanding of the way that search engines collect and index their data, i.e. (to oversimplify things for the purpose of illustration) I get that the search engine is just matching text patterns to my query, where as perhaps less technical people don't really understand this and if they think of it at all, they might unconsciously imagine that the Google search page is the interface to some kind of Sky Net like artificial intelligence that is able to take their question, ponder it and provide the most relevant answers. Maybe anthropomorphising our tools is the human default?

Or maybe I'm totally off base here... just some random musings really.