The wire management isn't an issue. If the bundles of wire are tugging on the coax connectors they might be coming apart and creating a bad connection. It's just like R/C wiring, bad connections have higher resistance. That's why I love fiberoptics. Too bad you cant run a car on red light....
Paralyzed, try rebooting your router / firewall (I really hope you have one!) and your cable modem. Some brands have issues that cause performance to degrade over time.
It depends on the time of day though- this was done at ~5:40pm in the UK, but after most people have gone to bed, it gets alot quicker due tio less traffic- typically about 7-8mb/s. Still crap compared to some of you bastards- I hate you and your super fast internet connections...
Edit:
20 minutes later and its nearly twice as fast- bizarre......