AT&T does that a lot around here... every 6 months they knock at my door saying that they have been improving the network and sell it as fiber but the fiber only goes to a main box in your neighborhood, and copper goes to your house (it's probably been the same for the last 10 years)... but to tell you the truth, I don't care if it's fiber, only the actual speed matters (with AT&T it is not very fast).

I could get 2000mbps with Comcast and can only get 25mbps with AT&T...