The reason why these 4G iPad users are busting through their data plans is simply because a faster network means they can do more with their tablets. It’s like when you went from dial-up Internet connectivity at home to a broadband connection.
On dial-up all you likely did was check e-mail and a few Web sites. When you got broadband, you went to a lot more Web sites that had more graphics and used Flash. You started streaming music and video. You uploaded and downloaded pictures. These activities inherently require more bandwidth than simply checking e-mail. And they simply weren’t possible on the dial-up connection because it was too slow