> My guess is that it doesn't seem to know when it found
> a good key, and keeps trying more.

Did you read
http://www.gnupg.org/faq.html#q4.2 ??? You should...

The dots indicate that gnupg needs more random numbers. Just move your mouse (when you're using X) or press some keys. You can also check available random numbers with rndctl -s.

Hope that helps,
best regards

SK
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