After her quickstep, Craig said that Claudia had danced as if her life depended on it.
I think from the first dance Claudia realised the writing was on the wall, and that the only way she could get to the final was by avoiding the dance off as other wise she was doomed. You could see by her face that she realised how it was going to be when the marks came through for her rhumba.
I suspect the judges know how the public votes have been going. If so, and if Saturday is a guide, then it is quite likely that Louise has been topping the public vote. If so then Louise getting equal 3rd with Claudia would almost certainly save her.
Marking Ore higher than Claudia would give justifcation for saving him if he was n a DO with Claudia, and as was the case they would have no problem saving Danny against anyone, as he has been the stand out dancer right through the series.
Not that I'm one for conspiracy theories mind you