Nah, Apple never made any promises about it. There was rampant speculation before, as well as tons of media hype, but no real announcements from Apple.
What's Apple's fault? Making a device that's just a large iPhone, in essence, in a market that has numerous other products out there which can do just as much, if not more, and not only that, do all that better than the iPad can. Truthfully, it's the same case as what happened with Apple and the iPod, except this time, bigger companies have entered the field before Apple did, and more of the interested consumers are informed better.