Led Zeppelin's particular success in the United States can partly be credited to Grant's keen sense of US audiences and the vast underground movement that was sweeping the country. It was his knowledge of the American touring scene that thrust Led Zeppelin into the forefront of the burgeoning American rock market, and under his stewardship the great majority of Led Zeppelin concerts were performed in the United States, resulting in massive profits for the group. He ensured that the vast bulk of ticket profits wound up in the hands of the band rather than in the hands of promoters and booking agents, and is reported to have secured 90% of gate money from concerts performed by the band, an unprecedented feat. By taking this approach he set a new standard for artist management, "single-handedly pioneer the shift of power from the agents and promoters to the artists and management themselves."