Tonight's performance really appealed to Janet's core fanbase, far more than the past few. You might not see it, so you'll just have to trust me. That doesn't mean I think she's safe though, because is her core fanbase actually big enough to see her through by themselves?
Amelia is safe more due to the fact that she had the pimp slot and has been reintroduced than anything to do with her performance, which was stunningly average. Marcus probably has enough steam from last week to see him through. All the others are in varying degrees of danger.