@mountain_lion:
The upgrades from 2Mbps to 4Mbps would probably only happen in December - Feb, because the 4 - 10Mbps hasn't happened in Stellenbosch yet as far as I can tell.
I'm still having congestion issues outside the time period 03:00 - 06:00, where I'm struggling to get more than 1Mbps on my 4Mbps ADSL line.