: Start rant about a rant:
You do realize that as a language and its common terms are spoken over a period of time, the language will evolve and definitions of words change. This is why many scientific classifications are done in Latin, which is more or less a dead language. What do you think will happen when you have a general public that has little, if any, knowledge of a subject (such as high-speed internet connections) trying to quickly pick up a subject when making a purchase? They will try and find the simplest definitions they can to explain the "new" terms they hear and read in the information given by sales people.
Furthermore, the English language has this funny thing called context. This allows words and phrases to have different meanings that will apply to different situations or sentences. So if you are talking with your computer illiterate grandma about how to get switch from her AOL internet connection, you can use the term bitrate (without reference to the actual function of symbol rate) to say that DSL, cable, or FIOS connections will load webpages much faster. On the otherhand, if you are writing a technical paper, you can use the technical terms in their original and not-dumbed-down state without problems.
Definitions of technical words change and words get "dumbed down" by the general public. Get over it. :End rant about a rant