Current results for the very same miners are aprox 820GH/s according to the miners, aprox 774 GH/s according to Kickass. That's a difference I can more easily accept.
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Moved the miners back to Hamster and for whatever reason the Hash numbers are now appearing more reasonable. A question of phase of the moon or is it just that I haven't waited long enough? Still, will be watching this puppy!
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Significant passage of time and some Hamster Hash numbers are crazy low and some are crazy high. Was I just too sensitive? Maybe! In any case, for the time being, I'm giving Hamster the benefit of the doubt.