I think I know the answer to this already, but I'll throw it open to see if others' thoughts correspond to mine.
I have an AOL up to 8 Meg service. This has been working to my satisfaction, with download speeds of between 5000 and 5500 kbps. However, over the past few weeks, principally on Sundays and evenings, the download speed has been dropping to as little as 200kbps. As I write, my router is synchronised at 7028 kbps but the download speed as measured by BBmax is only 1200 kbps.
Am I right in thinking that this is likely to be a consequence of contention - just too many subscribers trying to use the same bandwidth? I've no other problems with my PC and I don't download huge amounts, so capping is unlikely.
As ever, grateful for your thoughts.