Lanefan
Victoria Rules
Today that seems to be the case; but I'm not sure it was in 1997 when the game was dying. At the time, a fair chunk of the remaining player base were holdovers from the 1979-1983 glory days of 1e, and those who - like me - came to the game in college during that time would have been over the cutoff age. Those who started during D&D's early days would have been even more likely to exceed the cutoff age.Well, we also know that people over 35 playing D&D are a fringe minority of players still, so that makes perfect sense.
More importantly, most if not all of the people involved in designing, promoting, and expanding the game during its early years - including Gygax and Arneson themselves - would have been excluded.
Edit to add: and excluding fringe minorities from surveys is a very slippery slope: who do you exclude next?