Impressive [ bolded item]. Based on hits on older discussion forums electro-tech, allaboutcircuits, and for a baseline using element14, eevblog is both unique in content and has grown well.
Considering there are many older boards out there that are far below 0 and don't even make the graph, such as
http://www.dutchforce.com/~eforum/Chart from alexa.com, for details see alexa.com on individual boards and check 'search analytics'.
Most of what can be found on electrotech or allaboutcircuits can easily be found if the posters read Art of Electronics well, and what they post eventually becomes redundant as good information through old posts are already archived. Then again, why take the word or post of a nameless poster when you can be far more sure about a concept in electronics if Horowitz and Hill said so? It has been peer reviewed by readers, practicing EEs and professors in EE for over 10 years?
eevblog has a heavy dose of folks who are more experienced. If you look at alexa analytics a large number of search words for eevblog are specific products, so readers are already doing something that requires test equipment or have moved ahead enough to want to get such gear. There is very little gear discussion on the 'other' forums.
That said, if you want to hear or speak to an audience who are really into electronics, who build, buy, work and sell either services or devices using electronics, you can't beat being here. That means your product reviews, tear downs, hacks, mods, are reaching people who truly can appreciate it and newbies can see exactly what they can become if they persevere.
Thus, I find the other forums don't amount to much, as they cater mostly to beginners so its not a loss not being there. Being a long term member or helpful means nothing to the idiot administrator. I had neen a member for about four years, had nearly 10,000 posts to my name and one of the highest karmas on there but it didn't stop him from kicking me out like a piece of rubbish. ...