If I see a hub is doing well, I will look to write another hub on a similar topic, or try to expand on the original subject. I would never delete it, as you would lose your Google position in the searches.
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LOL, no worries. I would not delete a hub regardless of how it was performing. I have had success in re-writing poorly performing hubs as well as doing more SEO work, so I would look to do that rather than delete it.