The idea that the Moto X will get updates faster is pure speculation. Neither the Galaxy S4 nor the Moto X have 4.3 yet, so it's hard to say that either one will be better or worse for how timely their updates are. We do know that the S3 (yes, S3) will be getting 4.3 so there's a good chance the S4 will be getting updates for over a year as well. Motorola has changed ownership and kind of retooled some of their strategy with the newer phones so it's hard to find precedent for how they'll update. I agree there's a good chance that they will give their flagship phones updates for a while as well, though.