The questions from readers from 6/1/97 (quoted earlier):
With similar sincere intentions, Gods servants in modern times have tried to derive from what Jesus said about generation some clear time element calculated from 1914. For instance, one line of reasoning has been that a generation can be 70 or 80 years, made up of people old enough to grasp the significance of the first world war and other developments; thus we can calculate more or less how near the end is.
However well-meaning such thinking was, did it comply with the advice Jesus went on to give? Jesus said: Concerning that day and hour nobody knows, neither the angels of the heavens nor the Son, but only the Father. . . . Keep on the watch, therefore, because you do not know on what day your Lord is coming.Matthew 24:36-42.
Thats not clear cut, specifically stating the rank-and-file, but the rank-and-file know this refers to them. This is the pattern of blaming the people for reading too much into things.
I asked my dad about this shortly after the change happened to get his views. He responded that JWs never have looked to a date. (cough, cough, gag). I have the feeling that this sort of statement wasn't original, that he was parroting it from someplace.