Waitlisted again last week. I had been expecting a ding actually!
I'm an international applicant & I doubt I'll be able to get my visa in time if I get accepted right this second. I asked my WL manager about it before, and she said Kellogg will leave it to the applicants to voluntarily withdraw if they think there's not going to be enough time. So it seems they don't really make an effort to make an early(-er) decision for internationals (unlike Duke!)