There is absolutely no way for sales or tech to know whether you get 4, 3 or 2 HD service or no service at all until the tech comes and checks at the NID.
The problem arises since they know where the VRAD is, they have to estimate distance from the crossbox/VRAD without knowing exactly where the crossbox/VRAD fell in your original line length.
So they estimate who can get Uverse by this some can get a 55M profile, many get the 32M profile, some get the 25M profile, some get pair bonded service, some can't get any Uverse and others who were not estimated are found that they can get Uverse.
Others who can not get VDSL 2 service are offered ADSL 2+ upto a 25M profile and 18M internet/Uvoice service.
Chris