Spoooon, ADSL is run on the high frequencies on the same wire as a POTS line. While technically possible to not have dialtone on a loop but have ADSL on the loop, no LEC that I know of will do it. Partly because they really really want to sell you a POTS line (that IS their business) and partly because they don't like customers being different and some regularity makes the provisioning and support process easier for them. Also remember that residential ADSL is a cheap service, often even a money-losing deal... they normally aren't going out of their way for any one customer.
SDSL, SHDSL, HDSL, VDSL, and so on are run on their own pair. Many LECs will be extremely confused about you trying to provision the dry loop for these services without a POTS line because their engineers use the POTS line's records to find you and to find the cable plant components between you and the CO, but if you are persistent and your data provider (DCLEC or DILEC) is clueful, this can be worked around. I moved and ordered a SDSL and POTS line at the same time - the POTS line not having landed yet caused some trouble on the SDSL loop's order, but the DCLEC was able to beat the ILEC up enough to get them to just figure it out.
(Have I used enough Telecom Act of 1996 acronyms yet?
