I was young kid in '75, but remember it clearly. My parents dropped everything in '74 and pioneered. We had also moved 'where the need was great' in the early 1970's. Of course, my dad had to go back to work when 'the end' didn't come because he ran out of money. To this day, my parents claim they didn't pioneer because they thought it was going to wrap up in '75, only because their hearts motivated them. They did pioneer again in the 1990's, and now in their early 70's take advantage of the 'wonderful arrangement' to pioneer with only something like 20 or 30 hours a month (not sure about the details on that one...). The cognitive dissonance that I see blows my mind.
On another note, many younger JW's that weren't around in 1975 don't believe what a big deal it really was in the org. If this was any other religion with a similar false prediction, JW's would be all over it, telling everyone that this proves that God could not behind that organization. But with JW's, just more 'new light'. Wow.