If the iPad cost $139/$189, then you'd have a point. As it is, you really don't. You pay a premium of $350 and up for that multi-use device - if all you want is an e-reader, that's not an intelligent thing to do.
You may not realize it, but you didn't actually counter the statement "it's a quarter of the iPad's price" in the least. Some bozo who owns a 15 lb. 20" Toshiba laptop could just as easily mock your iPad, according to your "logic" anyway.
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Good grief, why do some people seem to need self-validation that apparently they can only achieve through sophomoric mockery? You love your iPad? Great! My daughter loves her iPad too - but my wife prefers her Kindle.
Why are you guys so insecure that you take any differing opinions or preferences as a personal affront?