If your carrier offered data at 25/10 (in megabits) speeds, how much data would you likely burn through in a day, week or month? For me, I would probably end up going over 6GB in a week if I didn't care to monitor it at all. PS. I sure miss twitter integration and #hashtags.
I have 10 mbit/s both ways. My router's data show that, during the whole October, I downloaded 86 GB and uploaded 83 (most of it probably BitTorrent).