So the matter is in SA, to choose an ISP that will or does optimise routing for gaming.
(Are there any ISPs in SA that specifically offer packages optimised for gaming?)
And how many locally located online gaming servers are there? And if there are any, where are they located?
Currently, it would appear that ISPs, in general, do not optimise their network routings for anything except their own benefit.
Having said that, If you live in KZN it makes sense to pick an ISP that is able to guarantee international routing via the east coast cables and if in CT on the west coast cables. Internally in the country, It is a toss-up!