AT&T and new data plans

At first I was pretty upset about the new AT&T data plans thinking it was going to really cost me a lot more, but my current unlimited data plan is $30. The new data plans are $25 for 2GB/month and $15 for 200MB/month. AT&T reports 98% of people are <200MB/month. I went back over the last 2 years of bills and there was only 1 month where I crossed over 200MB (hit 300MB that month). Looks like if you cross over you can buy another 200MB for $15 which would put you up to the cost of the current plan. So it doesn't look to me like this move will cost me more, in fact i'd go for the 200MB plan and save $15/month most months. But, of course, thats only if I stick with AT&T when my contract comes up on 7/11. We'll see.