I just love being at work. And yes, it's even faster outside rush hours.
As for the original topic... Just as the few examples here, most of the ADSL-problems I've seen, have been caused by faulty/old cabling somewhere between the DSL-modem and the nearest
DSLAM. Most often within the customer premises.
If I had a persistant and serious problem with my DSL-connection. I would start solving the problem by simply renewing ALL the telephone wiring and plugs that one could get a hold of and at least checking (preferably renewing) the wiring integrated to the structures of the apartment/building. Telephone cabling is relatively cheap to renew and an easy place to start debugging.