Switch or not to switch?

So, this is the question of the day. On my way to work this morning I heard a commercial for auto insurance companies debating who has the better rates. They make it sound as easy as picking their company since it is always the cheapest. But, when I go to their sites and get quotes, it never seems to be cheaper than what I am currently paying. I don't get their claims. They sound so convincing in their ads, but they never seem to add up to any savings.