one of my favorite books in college was -- how to lie with statistics. As the previous poster indicated, your sample population has to be chosen carefully to not skew the results.
For the best indicator of ebook sales, we would need unit sales data from each of the manufacturers - Amazon, Sony, B&N and others. This info would be hard to get.
The ipad is a great device for "media consumption" but its LCD has a short battery life and does not do well in direct sunlight. In addition, it is much heavier than the Sony and other ebooks.
By the way -- how would you load ebooks onto the ipad? No usb ports. Would you have to go through an Apple-related vendor?
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