This has got absolutely nothing to do with whether Telstra (or any other ISP) buys sufficient or insufficient CVC ("capacity"). It is simply that these particular copper lines - because that is what they are - will NOT physically support the speeds that were sold to their subscribers. The doubters and naysayers can spruik all they want - if Telstra were to buy ten times as much CVC as it needed for this particular subset of subscribers, they would NEVER, EVER get download speeds above 25Mb/s (which is Telstra's default offering). In fact, many of them are incapable of getting even that paltry speed. Spin it any way you want - you cannot make a silk purse from a sow's ear. And the NBN is - putting it politely - more like a sow's turd than its ear!