I had a similar experience. I naively used the Google Traffic Estimator tool very early on in the planning process of my startup. Unfortunately, I gave a strong

I had a similar experience. I naively used the Google Traffic Estimator tool very early on in the planning process of my startup. Unfortunately, I gave a strong weight to these estimates -- which turned out to be very, very wrong (I was using it to find CPC and traffic for major metro areas). Lesson learned. Get lots of estimates and be as conservative as possible.