Note that the signal strength indicator dropped to 3/4 bars during the '4G'/LTE test so I will need to find a location where I can get full strength and then retest to reveal the full potential of the Vodacom LTE network. (Update: I have since located an area with full Vodacom 4G signal and I actually achieved less impressive results than with 75% signal, but I will keep scouting...)
None the less, I am already impressed by the speed on offer by the Vodacom LTE data network in spite of not having full signal - LTE download test results are 46% faster than HSDPA and LTE upload test results are an amazing 432% faster than HSDPA (at the same location).
You can also get a feel for every day Vodacom LTE performance here or get Vodacom LTE network tips here.
Vodacom 4G/LTE speedtest.net results, Emmarentia, Johannesburg
Vodacom HSDPA/3G speedtest.net results, Emmarentia, Johannesburg
For what it's worth, I got about 2.5Mbps download and 1Mbps upload on Vodacom LTE with 1 bar of signal strength, so network performance is better on full signal HSDPA than average / low signal LTE.