Yeah...outside of the Islamosphere, where it is possible to be a Christian, agnostic, atheist, or whatever, you find less commitment to Islam, many times without finding a corresponding decline in mosque attendance, as not believing in Islam is still dangerous if you are within an ethnocultural community that defines itself by that religion. I have a Pakistani friend, born in Qatar, who had to move across the United States to get away from his parents in order to live as an atheist. When he was still living with them, he was compelled to participate in Islamic ritual as any faithful Muslim wood, for the sake of abating his parents' anger, and preserving their honor within the community. Is this what the expert means by devotion?
In these circumstances, it is virtually impossible to find the kind of laxity in Islam that you might find in Christianity or Judaism, but that is not really a faithful indicator of the religiosity of Muslims, particularly around the world/outside of the Middle East (as many forms of Islam in Africa or certain parts of Asia far removed from the Arab center are highly syncretic, making even a large majority population less impressive in reality than they are in bare numbers; we Christians in the West can probably relate to this!)