I thought that initially, but they mention in the article "2 terabits of daily bandwidth", which I assumed to be a metric of per unit-time. Furthermore, I found a graph detailing internet usage per user per month for various countries [1].
If we take New Zealand to be equivalent to the North American average (higher than the European average) of 14.5 GiB/user-month, and apply that to the 2.6 million internet connected people in New Zealand, this equates to an average bandwidth of 14.5 GiB/sec, or around 116 gigabits per second.
The only way you can get close to 2 terabits per second is to assume all of those 2.6 million people use 256 gigabytes of bandwidth per month - and certainly, I don't think that the people in NZ use ten to twenty times as much bandwidth as the other countries in the world [1]. (Other assumptions: 30 days in a month, and all of the 66% internet connected population in NZ uses 14.5 GiB per month)
I'm willing to bet NZers use less than the average. Data caps are very low (30-40gigs is standard, all you can eat is uncommon) and speeds firmly abysmal (3-4mb here off peak, I'm in the biggest city, Auckland, and am about 10-15 from the centre).
If we take New Zealand to be equivalent to the North American average (higher than the European average) of 14.5 GiB/user-month, and apply that to the 2.6 million internet connected people in New Zealand, this equates to an average bandwidth of 14.5 GiB/sec, or around 116 gigabits per second.
The only way you can get close to 2 terabits per second is to assume all of those 2.6 million people use 256 gigabytes of bandwidth per month - and certainly, I don't think that the people in NZ use ten to twenty times as much bandwidth as the other countries in the world [1]. (Other assumptions: 30 days in a month, and all of the 66% internet connected population in NZ uses 14.5 GiB per month)
[1] http://www.websiteoptimization.com/bw/0912/