You're speaking to the advertising issue. The reason why the words “up to” appear is quite common amongst most providers. Because the Internet is a shared resource, it's impossible to guarantee it unless you have a dedicated line. Consequently, that's why you frequently will see that choice of language referring to “up to”.
The specific speeds that your average customer receives are dependent upon where they are within the network and which particular platform they're on, etc. We do have all of those statistics, but we have over 2,000 towers, so it's a bit of a broad range.