Ragnor: That sounds a bit odd, what area/exchange was this?
You can lookup the address on http://www.telecomwholesale.co.nz/maps to find out what the exchange or cabinet name is.
Exchange Area: Mt Albert (Auckland)
Cabinet Name: MAB/BX
I was told that although the cabinet had been upgraded to ADSL2+, there were just too many people using the network in that area (or something like that). The person I spoke to said that he was telling me this upfront so that if I experienced performance issues after being connected, I would know that Snap might not be able to do anything about it (or words to that effect).