If I can deal with the semantics of the original statement, i would say that it is true if you replace the word "advance" with "influence". The word "influence" is not inherently positive or negative. I feel like the influence (negative) of Elvis is unrivaled. he let corporate America see that black music can be pimped on an ASTRONOMICAL scale. this has greatly affected the thrust of black music in America ever since. Elvis is the catalyst that tipped the balance. He showed and proved that the soul-stealing process can be white-washed and packaged for mass consumption. Thats why whatever genre of "black" music in America you examine today, the people at the head of their fields are about the SALES as top priority and not the HEART AND SOUL of the music itself. Elvis' influence on black music in America is unmatched and its a terrible thing. he made soul-stealing in the realm of music a viable, super-industry.