See OP post. I've also seen other statistics that suggest raiders,
as a whole, are a minority within EQ and a relatively small one at that (~25% of the population). That's counting guilds that are still stuck at CoA/Demi, who may not have raided anything else for the past 2-3 years.
WoW, which follows a similar but less exclusive model than EQ, has similar statistics, by the way.
Most people just don't raid. See:
http://tobolds.blogspot.com/2006/05/raid-numbers.html for one analysis.
And while it's fine to explain that away as "well, it's just a matter of personal preference," once you start looking at the economic costs of developing raid content, you'll realize, as many new MMO companies have, that raid content isn't worth the % of development time that's currently spent. Yet, if you don't, those who
do raid won't have enough content. The whole ordeal becomes a trade-off problem and it's becoming increasingly clear that the trade-off does not favor raiders. Hence the reason MMOs are moving away from the model.