Any luck getting your latency resolved ? I've had no luck so far. I'm escalating it to someone higher than the tech supervisor (the last supervisor told me that it was normal to have fluctuating latency... I say baloney).
There is a serious problem with parts of Rogers' network. My problem is right at the head end, the first hop from my modem. I use CAT6 wiring so it's not a WiFi issue. I installed a program called PingPlotter on my PC which graphs the latency ever...