AFAICT, "old school" seems to most reliably mean "reminiscent of the game (or the same game) I was playing when I was younger." Sometimes it seems to mean "reminiscent of a game (or the game itself) that isn't being published anymore."
For my money, anything (originally) published before I graduated college in the early 90s is old school. I don't expect or need anyone to agree. Personally, I don't intend on using the term as a shorthand for some set of precepts about which I may or may not have an opinion, which I may or may not feel I've outgrown, or for which I may or may not be nostalgic.
I'm amused that it's changed from a pejorative ("Pshaw, that's so
old school!") to a compliment ("We're going to game
old school!") and that folks are using the term to denote some kind of ineffable greatness: that despite the "flaws" of "old school" gaming, it's still something to be treasured, emulated, or otherwise recalled.
I should point out that I don't dispute there are fond recollections to be had; I have plenty myself. "Old school" to me means a time when I had fewer responsibilities and (consequently) more free time to play D&D with people who were (some of whom still are) good friends. If somehow D&D 4E had been published in 1980, and AD&D 1E was being published now, D&D 4E would be "old school" to me.
I also don't dispute that games getting the "old school" label by dint of their age or precepts are fun games. I played OD&D in the late 70s and early 80s and had fun. I played AD&D 1E and 2E in the 80s and 90s and had fun. As it happens, 1E and 2E were when I did most of my "creative" work, tinkering, and so forth, and when my most memorable campaigns and characters were born.
What I do dispute is that a poll like this will have a major effect on the debate over what "old school" actually means (if it can be said to mean any one thing at all).
