Those numbers are interesting and encouraging. Johns Hopkins did a recent study (I think it was on participants in Minnesota) that had significantly lower prevention rates for delta infection for Pfizer. Either way, the effectiveness vs hospitalization and death is what counts since most everybody is going to get delta eventually either way.
They are all over the board but the bad ones s what gets passed around. NY has a graph showing no drop at all vs hospitalization since early May. Once everybody gets delta or the vaccine, cases won’t matter as not many will die or be hospitalized. That may take a year though.