It is hard to believe that in just under a year ago, Apple introduced the iPad and persuaded many to change their views of mobile computing. The iBook Store was launched a few months later, and changed people's perception of e-books, but when Steve Jobs said Apple planned to "Stand on [Amazon's] shoulders and go a little further," he may have been mumbling more than just some marketing terms.

According to a post by AllThingsD with data from a ChangeWave survey, the iPad share of the e-book market has more than doubled since August. That means that iPad and its iBookstore is now just under a 15% reach to the Amazon Kindle e-reader.

In the survey of 2,800 users, 32% said they used the iPad as their main e-reader, while 47% said they used the Kindle. You can see how the iPad is closing in on the gap when you look at the previous survey that found 62% of people were a Kindle as their e-reader of choice and only 16% were using iPads.

Probably the most shocking news, especially for Amazon, is what respondents said they'd buy next. Of the people planning to purchase an e-reader in the next 90-days, 42% responded they would pick the iPad, while only 33% said they would go the Kindle route.

“The Amazon Kindle is hanging on to a rapidly diminishing lead over the Apple iPad among current e-reader owners….The iPad is likely to be the biggest beneficiary of the expanding e-reader market this holiday season," said Paul Carton, director of research at ChangeWave.

What are your thoughts? Do you prefer the Amazon Kindle over the iPad, or vice versa? Let us know in the comments below.

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