It depends on the ISP. Many Internet Service Providers have been known to throttle a user’s connection speeds if they engage in certain online activities, such as P2P file-sharing or streaming from “unapproved” sources. While I haven’t heard of any ISPs targeting Xbox Live users, you might want to check with your ISP. They may throttle your speeds when you hit a certain data usage level each month. Again, check with your ISP to be sure.