That's actually in reference to something. I think someone wrote something bitching about one of Dan's reviews and called him a failed musician, but Dan's not a musician. The guy looked up his name and apparently found another Dan Ryckert who was a musician or something.
EDIT: It was the director of that terrible "Noobz" movie. He didn't like Dan's review of it and called him a "failed musician" on twitter.
They removed the Shaundi loyalty mission. It apparently revolved around the Saints Row 2 version of Shaundi (so not surprising it involved drugs). Sucks for any Australians who are fans of SR2 Shaundi.
According to IdolNinja, Sumalee Montano's voice is a southern accent. The African American female voice you hear in that video is likely the male voice pitched up. Saints Row 4 lets you adjust the pitch of the voice you pick.