Excerpt: On record, U2 suffers from a droning sameness and a lack of dynamics. In concert, Larry Mullens' drums boom, Adam Clayton's bass pops with a newfound dance fever and singer Bono Vox exudes a populist enthusiasm that offsets the lack of range in his voice. In short, U2 was good enough Sunday to be considered the leader of the modern-rock movement that is being embraced by a new generation of fans under the age of 21.