I have been doing telcom for 18 years and, from what you have said, it is complete BS. I can tell what speed you will get, or close to it, just by doing a line qual on your copper pair. If it is a CLEC, they do not have access to the copper pair until the line is ordered and the LEC ties it down on their frame. If the CLEC will re-use or resell the DSL, they still can't test the line. Even when the LEC , or CLEC after the order was made, test the line remotely, they cannot tell if the loop is bad 20 ft from your demark or 20 feet on your side of the demark without a tech being on site.--
I cried because I had no shoes, until I saw a man who had no feet..