Too greatly. Too too greatly. This list surely needs a cleanup. At first, most recordings mentioned here are country recordings having a little to do with rnr. Second, as rnr evolved from rnb (if they ain't no the same) the impact of rnb artists is too minimized in this article. We can describe every single genre like this, and the way it's done here let's say Jazz was developed from Klezmer, and House is just a synonym for disco. Third, the article is overflowed with stuff of 'who was the first to say words 'rock' and 'roll' in one song'. Let's then say House evolved from a record where someone said 'Rock the house'. Fourth the comment above of that 'rnr has no first song/first record' is something related to philosophy much more than it is to the encyclopedia.