Pinched from another board...
http://www.samknows.com/broadband/pm/PM_Summer_08.pdf
Quote:
The results produced over an initial six week period from 223 monitoring units were
certainly interesting. In summary:
- In the majority of metrics there was little discernable difference between most
ISPs;
- Zen Internet offered the fewest failures across all metrics;
- Virgin Media’s cable services and Be/O2’s services provided a consistently
low latency throughout, whilst Virgin.Net (Virgin’s ADSL service) performed
poorly;
- BT provided the fastest throughput when measured as a percentage of implied
line speed (an estimate of the potential maximum speed of the line);
- Be/O2 and Virgin Media produced the greatest raw throughput (in megabits
per second), which can likely be attributed to the nature of their products;
- Virgin Media’s cable throughput remained consistent on their 2, 4 and
10Mbps products, but was quite variable on their 20Mbps product;
- Testing highlighted the use of traffic shaping in the networks of BT and
PlusNet, which resulted in certain classes of traffic slowing significantly
during peak hours.
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