As of January 2014, about half the people in the United States owned a tablet of some sort. The iPad accounts for less than half of that number, so I would say at least 75% of people do not own an iPad.
I do not own (and do not wish to own) an iPad and so the answer is 0. On the other hand, someone, somewhere is using an iPad at any point in time so the answer is 168 hours.
250 million people
2,697,435 people put the iPad on their Christmas list in 2011. I checked.
You can be any age to own a iPad.
23,000,000
The iPad already has wifi............ If you have 3G it will still have wifi if you are in one place.
Umm Apple? The same people who made the IPad?
No but it we be preferred
A lot of people are iPad users I'm sending this from an iPad right now
The iPad Air is much slimmer and weighs less than the previous iPads. Many people do prefer the iPad Air over previous models.
The unstoppable juggernaut that is called "Apple marketing".
IPad does have it's own book store, and they do have a lot of popular books listed, but not as many as Amazon. This is because Amazon started out as a book website.