Yes, I also picked up on how Mr. Bingley was one of the few who noticed and appreciated Lizzy and Jane's close sisterly bond. Mr. Bennet certainly appreciated the closeness his two (favorite) daughters shared. I think the Bingley sisters scoffed at it (of course they didn't have the same kind of relationship, so they couldn't see it for what it truly was -or how special it was). I think the Gardiners would have felt a special warmness in their hearts at thinking of Lizzy and Jane's sisterly relationship. Other than those particular few, I doubt there were others who were aware of how special these sisters were to one another. Perhaps Charlotte? I could be overlooking people here, so please correct me if you think of others to add to the list!