I wouldn't start worrying yet Rob, these batteries are surprisingly variable even within a batch. From the beginning it's only been some who've experienced very early failures, and that's probably due to the territory where the bikes are ridden and what models are involved.
The original Torq using the same motor as the Quando gave the battery a far rougher time, it's high motor gearing in the 28" wheel meaning it spent much more time in the high power consumption region than the Quando. So basically a Torq used in a very hilly region would very quickly find a weakness in a battery, but a Quando in a flatter area could use the same battery for very much longer without exposing a problem. So your position should be quite good with a Quando and New York's alpine region not too testing.
In San Francisco things would be very different! At least we know with some certainty now that the replacement Sanyo celled ones are good performers, giving the bikes a reliable future.
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