Okay...I had to play it at least 4 times before I saw the change. The stupid sign in the upper right corner. I tend to agree with some of the posts...its HARDLY a significant detail.
The point being, cagers aren't looking for bikes. We're aware, and we'll notice bikes (and bicycles) far sooner than a cager.I always hate those tests. By telling you to watch for something, you're automatically watching for something.
What really matters is what you see when you aren't really looking, since that's how most people drive.