To begin with, your max upload/download speeds are primarily dependent on the specific type of connection package that your ISP gave you, and that can vary between ISPs. Residential DSL is usually ADSL; the "A" standing for Asynchronous. This means that your max upload speed could be capped at a much lower rate than your max download speed. The residential service most common is 768K down/128K up, so if that's the package you have you're doing fine.