Yes, Google is "tailoring" our searches for us based on our internet activity. I read an article about this a couple of months ago that went into great detail.

As one example, the author contacted 2 of his friends with different search habits, and they all typed in the word "Egypt" at the same time and all got entirely different results.

Since I've got my laptop that I haven't really used in the last 4 years, I took it and my sons laptop, and my desktop and typed in a one word search and got 3 totally different sets of results.

So Big Brother is watching us and tailoring the internet to what it thinks we want to find. I'm quite sure Google isn't the only one doing it. Even the ads on the pages we look up are usually tailored to our activity.