I for one find yoko's detailfilled comments of high interest, and even if he is from Boeing he could still have a current license because they do have some pilots there. He do however seem to not only have a very good handle on not only all the older and current relevant procedures, checklists and memory items, but also what was behind creating them including thinking and rationale. This leads to that he is more than a run of the mill pilot but one that have access to Boeing internals. Either as a direct employee or as a direct informed priviliged senior instructor pilot and procedure creator at one of the customers.
Specially his post on the memory items and the increase of the automated speed of the stabilizer changes was interesting. Before if slow = automation, if fast = manual. But now automation is faster than manual electric trim and therefore cut-out switches are changed to Primary and Backup to avoid pilots following the checklist and identifying it as the wrong type turning off the wrong switch. This is the first insightsfull and plausible explanation to why the function of the switches where changed. (His was better than my extracted short version)
After that one can just ignore any contributor's obsessions with blaming others than Boeing, as to own preferences. Only time will tell if all currently available negative feedback to Boeing are out in the open as yoko hints to. They haven't exactly been fast forthcoming with official non-lawyerspeak info so far.