The error this analyst makes is similar to what we see so often in this forum; Assuming everyone must be in the same environment as me with the same requirements. (The "I don't use 100MB/month, therefore no-one else does" types).
Different technologies address different needs and thus are mostly complementary with little overlap. Each has it's own unique combination of ease-of-installation, costs, performance, etc. In every country, a different ratio of installation will thus be evident.
FTTH, VDSL, LTE, ADSL, HSPA+, 3G (and even WiFi) all has its place in delivering broadband in SA, with LTE likely the dominant technology for the foreseeable future.