Yes it's getting slower by the day.
It's still better than the competition though. I'm currently downloading from usenet at 90kB/s, yesterday I was getting 440kB/s at the same time of day. The inconsistencies suck, but for R500 odd, you won't find a better value for money service. I'd love to get full speeds all night, but I'm not yet willing to go back to axxess express at R999.