Rolling Stone "discounted" the debut if the artist went on to greater success, and gave extra recognition to debuts where the success was never repeated. They skipped debuts from artists who had left well-known bands.
This explains why Greetings From Asbury Park did not make the top 25, but does not explain why Boston is not in the top ten.
As is the case with most Rolling Stone lists, it suffers from a bit of pandering and political correctness. So while their guidelines were not a bad idea, some of their choices (and the running order) are, in my opinion, missteps.
Here are the second 25 titles in their top 100 debuts...
26. Run DMC (S/T)
28. The B-52’s
29. Wu-Tang Clan “Enter The Wu-Tang (36 Chanmbers)”
30. Arctic Monkeys (S/T)
31. Portishead “Dummy”
33. The Killers “Hot Fuss”
38. The Police “Outlandos D’amour”
39. Lynyrd Skynyrd “Pronounced Leh-nerd Skin-nerd”
40. Television “Marquee Moon”
42. Oasis “Definitely Maybe”
43. Jeff Buckley “Grace”
44. Black Sabbath (S/T)
45. The Jesus And Mary Chain “Psychocandy”
46. Pearl Jam “Ten”
47. Pink Floyd “Piper At The Gates Of Dawn”
48. Modern Lovers (S/T)
49. Franz Ferdinand (S/T)
50. X “Los Angeles”
My biggest problem with this portion of their list is that I'd have had Van Halen and Boston a lot higher.
As much as I like The Doors, I am not sure they'd be on the list (although if Franz Ferdinand makes the list, shouldn't every band?)
BOSTON-MORE THAN A FEELING
VAN HALEN-JAMIE'S CRYIN'
THE KILLERS-MR. BRIGHTSIDE
THE DOORS-LIGHT MY FIRE
LYNYRD SKYNYRD-SIMPLE MAN
BRUCE SPRINGSTEEN-GROWIN' UP