Reading inbetween the lines, I'd say it's few technicians stretched too thin that is the root cause of the problem.
Earlier this year, my brothers phone was fixed by a Cape Town technician - Telkom had to get guys to come up to Joburg from the Cape because of a shortage of skilled workers. The Telkom guy that fixed his phone told him this.
When my ADSL line was installed, I had a long chat with the guy that installed it - this was November last year. He told me I was lucky to get a line as the demand is massive. He also indicated Telkom is worried about competition, or at least, many workers have been told to be more polite. To try to combat the shortage of workers, they introduced an electronic "job" system - the techies only need to report to "the office" once or twice a week. The rest of the time, they get their assignments via this electronic gadget - didn't get too much of a look at it, sort of a PDA thing.
I would imagine the introduction of the DSL 192 has made things even worse regarding the availability of ADSL.
The only thing that would alleviate the problem in the short term would be to allow the bigger ISP's to install ADSL lines too, like they do in the UK and Australia.