Sorry, but this just isn't true. There are a lot of things other than over-subscription that can cause slow speeds and packet loss: loose connections, faulty interior wiring, faulty exterior wiring, defective tap, defective amplifier, RF ingress, etc. Almost everyone who complains about slow speeds ends up having one of the problems I listed once they post their modem signals and logs. Over-subscription is a problem but it's definitely not the only problem. People shouldn't give up without properly troubleshooting their issue.
