That was probably all of the data in the failure claims database with more data being available for the older models. Statistically I would say they have pretty large data sets to pull data from, certainly as large as any I used in University level stats courses. With this large a sample their margin of error is probably in the under 2% range.
While there are multiple models of Blackberry and Treo available there is only one modle of iPhone available. Multiple models would smooth out the data from bad models so it is pitting the one Apple product, good or bad, against the averaged out industry trends. In that case I would say the iPhone is doing pretty well.
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