“And when the Brits initially kept their distance, Led Zeppelin grabbed America from the opening chord.”
– Barack Obama.
So, is it true that the people responsible for launching the careers of The Beatles, The Who, The Kinks, The Small Faces, Pink Floyd and Jimi Hendrix kept their distance from Led Zeppelin? The only test I can think of is to see how well their records performed in the charts. In this, Wikipedia is your friend. And it shows that all of Led Zeppelin’s studio albums did at least as well in the UK as in the US and that Led Zep I (the one with that opening chord) did better.