cyril7: Exactly, to repeat, TCL have some issues to deal with, looking around the planet at other DOCSIS operators I dont see users b1tching about ARP storms like TCL have. The fact that TCL take no reponsibility for CPE end NAT routers or supporting them in some form or manner indicates they dont give a damn.
To give TCL some credit (not sure if I should) I suspect this is a lot of legacy, Saturn built the network out in Kapiti, wanted to make their lives easy so assigned static IP's and kept the network flat, and it has just grown from there.
I remember when I was tracing ARP traffic I sniffed ~500-600 unique devices ARPing, now granted this was before the network separation, and you have to also consider that they were (not sure if they still are) running the management network for the Cable Modems themselves (also on a 10.x network) in the same broadcast domain as the Public Internet. Plus I also sniffed ~20 unique Class C subnets, so 20x256 + 10.x.x.x networks... potentially that's a whole lot of unique devices on the network. Taking into account that prior to the split that would be for every household with 1x internet and 1xDigital TV, that's 4 unique devices. I could easily see how the device numbers could climb quickly the more customers were on it.
So far I personally can't fault the Cable service. My linksys router (now a RV042, was WRT54GL) has never missed a beat, always had good down, and more importantly good up speeds, plus the latency is low, so makes for VoIP over VPN to international services achieveable and without a noticible loss in voice quality. And skype works a treat as well.