I actually believe that it is a shortage of bandwidth. It was posted a while back that they are strugeling with the amount of international bandwidth and that is expensive or something to that affect.
If I recall correctly some additional bandwidth were aquired and allocated for Cape Town sometime in November 2013. There was immediately an improvement in overall experience.
At the same the Telkom line speeds were upgraded. Obviously Telkom would have taken the upgrades in account.
I think where the problem started is that in that same period, many of the series episodes came to halt for the Thanks Giving holiday and in general for December.
Most episodes resumed and got aired from the 6th of January.
It seems the Cape Town users for the various ISP'S's are much heavier on downloads.
I can recall another ISP mention this and they could not understand why Cape Town was so heavy on bandwidth.
So my theory is that TI underestimated the affect of the upgrades, the holiday season and the lack of series episodes to download via torrentd and Nzb's.
The problems seems to have started on the 6th, the very day the episodes started to air again and there with P2P, Nzb's and other Http downloads with many people returning from holdiday and also returning to work.
I'm not stating this as facts, but just my take on this.
Couple this with that TI is not coming out and responding with anything official, we are in for a long trouble some period if true. IPC bandwidth issues are not sorted out in a week or two.