I'd estimate that at least 50% of current JW's do not even remember the 1975 fiasco. They were not even born yet. The fact is that you have to be a born-in and at least 60 years old to recall it all. And you know damn well not to EVER mention it.
What any one else learns about it when they discover it, the info is based on the "WT spin". You know the spin. The "brothers" (GB) never said that! Some people "ran ahead" of the organization. But you can find a lot of exaggerated misinformation from apostates.