Anyone have any views or experience of S.L.A.N.T. teaching please?

Hello! newbie here. We are looking into schools, for our very recently diagnosed autistic child , and one of the schools seems very hot on the SLANT approach of teaching. It doesn't seem at all inclusive or beneficial to me. 

SLANT appears to stand for :

  1. Sit up straight  
  2. Listen - (Surely some children will find this much harder)
  3. Answer questions - (Some children have processing issues and need time to process the answer).
  4. Never interrupt (-hmm. good luck with that!)
  5. Track -keep eyes on the teacher-( I think some children might find it incredibly uncomfortable to keep eye contact. To the point that they are no longer absorbing any information. )

The brackets contain my initial thoughts. Does anyone here have any experience or views on it that they care to share? It's going to make a big difference to our decision, which we have to make very soon.  Thanks so much for taking the time to read this today.