Not very good angle in this picture.
This is bending at the waist:
This is not bending at the waist:
Have you seen Rejman's film or Patrice/Jaques riding videos? I guess not, otherwise you wouldn't have asked this question, Patrice and Jacques (and other good carvers with push-pull technique) keep their upper body quite erect, it's strong leg bending during entering into turn, which could make such impression.