Before addressing the authenticity of U2 or their music, it is important to gain an understanding of their specific musical style. Again, according to Grove Music Online:
U2’s style gradually grew from their new-wave roots and rested on simple harmonic patterns with no extended verse-refrain forms, a driving bass technique developed little from early punk, characteristic busy guitar patterns in a high register which made use of delay effects, and a recitative-like, high pitched vocal approach. The combination of these elements seemed to reinforce the band’s sincerity. Devotion to their audience and three of the members’ reasoned Christian commitment confirm the connotations of their style which has led to favorable comparisons with luminaries like Bruce Springsteen.
Beyond helping to increase their fan base and their album sales, U2’s “sincerity,” “Christian commitment,” and “devotion to their audience” were all functions of their Irish authenticity. The sincerity achieved through Bono’s passionate singing and meaningful lyrics added to the band’s authentic rock identity and allowed them to be taken seriously by their audiences. Clearly, Christianity and spirituality have always been part of the Irish national identity, and the band’s Christian agreement not only embodies part of the Irish culture, but the generality of the word “Christian” makes the band accessible to both Irish Protestants and Irish Catholics. U2’s perceived devotion to their audience also greatly increased the Irish public’s support of their position as an Irish rock band.