I'm not even familiar with The National, but I did read what was posted:
About The National
High Violet' is The National's most acclaimed and fastest-selling album to date. Released in May 2010, it debuted at #3 on the Billboard Top 200, and prompted the New York Times to claim "The National is in a league of its own." The band has toured non-stop since the album's release, with highlights that include sold out shows at Radio City Music Hall and Brooklyn's Prospect Park; a concert at the Brooklyn Academy of Music to benefit the Red Hot Organization, with accompanying live webcast on Youtube and Vevo directed by D.A. Pennebaker and Chris Hegedus; and mainstage performances at Bonnaroo, Sasquatch, and Lollapalooza, where they "seduced everyone" according to USA Today.
So... 3rd on Billboard Top 200, not exactly unknown.