I have not read Twilight--and never plan to--and have no opinion of the quality of writing, but it strikes me as unprofessional of King to slam another writer like that. It's not like he's a just a guy who read the book and hated it, I see it more as a guy publicly lambasting a colleague. A bit like a doctor writing to to the editorial section of a newspaper telling everybody how shitty he thinks another doctor is. He's certainly entitled to his opinion, but I think the way he expressed it wasn't in good taste.