That's not really a comparable experience in a city where you have multiple modes of transport, many different options for a single journey, and so on.
But I'd wager that the vast majority of Americans don't live in cities like that. It sounds like Citymapper is nailing its niche, so for people that fit that profile it's a much better experience.
But I live in Austin, TX. No one is taking a bus or train or bike anywhere. Especially not in a hurry. Virtually everyone drives everywhere; with Google maps on Android I can often do that in a single voice command and zero clicks.
"It takes 22 minutes to get to X, here are your directions."
I guess that's an unfair comparison. Fair enough about actually using the app though.