When the conductor announces 34th St-Penn Station, you never hear "Empire State Building," even though that stop is one of the two nearest to that much more famous and popular landmark. They don't announce "Museum of Modern Art" at the Rock Center stop.
I have nothing against the Top of the Rock. I'm just curious. Are the conductors paid to say this as some sort of promotional campaign? Because it seems like they must be required to say this, though not necessarily in an accent, or on equipment with a degree of high fidelity, that anyone will understand.