Good article, but I'm not sure I agree with the central premise. Specifically, are gamers geeks? Is there a 'gamers' tribe?
I can believe that somebody who isn't computer literate would describe a gamer as a geek, but if you delve under the surface it seems more complex. This is a world in which people want to fly their individuality like a flag, for every gamer who's considered (or considers themselves) a geek, there's somebody else who considers adult gamers to be overgrown children, and believes you're not a geek until you've submitted your first linux kernel patch (or at least installed Debian as your primary OS).
In the same way as my gran may have considered Meat Loaf to be of the same musical genre as Slipknot, it becomes easier to generalise the less involved or knowledgeable you are on a subject. For people who don't like or understand computers, giving a four letter label to a huge swathe of the population is easier than learning about them. I like the way geek has been reclaimed as a positive or at least semi-positive term, but feel its use is too broad to claim a group identity amongst those 'tarred with the brush'.
Just like someone freshly introduced to the word Christian might struggle to understand the enmity between different Christian churches while a devout follower would be able to define exactly why their church was 'correct', I think 'geek' is a term that has comparable layers of complexity beneath what seems a straightforward definition.
I suspect there are a few software engineers out there who would scoff at the idea that playing GTA4 qualified you as a geek, just like there are plenty of gamers who would accept being called a geek but be contemptuous of somebody whose work was technical but not interesting to them.
I'm also sceptical of the idea that there's a gamer tribe. The scenario you describe in the parent article could describe any trade event regardless of the specific industry. It sounds like industry 'networking' more than tribal behaviour.
I certainly haven't seen people wearing the same clothes outside of work requirements (that would scare me) and I'm not convinced that people who work in the same industry necessarily share interests.
For example, if I take two friends at work doing the same job as me, one of them is fascinated by War memorabilia, the other by hunting, while I like British 'kitchen-sink' plays of the 1950's and 60's.
Musically, one likes classical music, another strange 80's synth bands, while I listen to Indie (British and American) and most of the artists who are/were on the Anticon label.
All three of us agreed that Bioshock was a really well executed game, but my colleagues haven't played most of the games I consider my favourites and I haven't played a lot of their favourites either.
I guess what I'm trying to say is, there's very little crossover in our interests, as much as we're good friends there is no communal feeling or tribe. Each of us feels with equal certainty that our taste in games/music/films/politics/people etc. is correct and that the others are only sticking to their opinions out of stubbornness and a reluctance to lose face. (Three chiefs, no followers)
Having said all the above, I'm fully prepared to be told that I'm being a misanthropic old man and should stop picking holes in other peoples articles. Am I too old to be reading this?
My geek culture is a Commodore 64 playing Gribbly's Day Out or a Spectrum playing Jumping Jack. I'm not sure how widely shared that vision is, if I've got a tribe I don't think it's large enough to go picking fights.
Yours (hoping the warpaint covers what the loincloth doesn't)