didn't somebody say something about a chain is only as strong as its weakest link?
if that last little bit of connection from your house to the pole isn't fiber then it doesn't matter much that the rest of your infrastructure is fiber.
fiber like speeds isn't the same thing as fiber speeds. close but not quite.
So I assume you have fiber going all the way to your PC? If not, then you have some weak link in the chain.
I heard that Verizon used MoCA in a lot of the FiOS installs, which means that their last 10'- 30' or so is coax, not fiber.