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From what I've heard (my site isn't technical so I can't say definitively) technical sites have low click through rates because many developers use adblockers and may not be as attracted to advertising. But it's hard to estimate because it can vary wildly depending on how many folks are advertising in your space. Run a month trial and see how it does.

Hey, you might want to consider putting some contact info in your profile. Some people are wary of discussing Adsense specifics in public forums.

Yes. It is very low. You can expect atleast 4 times higher than that.

it massively depends on your market. Insurance and debt keywords pay much more per click than the code related keywords I have on my blog. The only figure you should be interested in is your CTR. If it's above 5% then you're doing really well. Average is probably less than 1% CTR. Good is 2-3%. In my experience anyway.