Note that Consumer Reports and Apple apparently had a pow wow and it was discovered that the settings they were using in Safari (to disable all caching) exposed

Note that Consumer Reports and Apple apparently had a pow wow and it was discovered that the settings they were using in Safari (to disable all caching) exposed some bug that was causing the fast run-down rates in those tests. (their tests on Chrome were consistent and long lasting) They are doing a retest this week. So on the battery front it seems not all is lost.