> "It is not faster (in the physics sense)."
Yes, but- to play devil's advocate- we use terms like "fast broadband" in that non-literal sense so often that no one even notices it, lets alone thinks to complain.
"Fast" in that context does make sense in that you can download files faster, but it's still a synonym for bandwidth rather than literal speed.
You could argue that such usage of "fast" doesn't make sense in terms of streaming (which is what digital radio effectively is) or that the comparison with analogue radio was meaningless and/or incorrect (given the quality issues). However, if one's going to argue against it on the basis that such usage is contrary to physics, we should at least acknowledge that we're (apparently) okay with that in other contexts.