2.Do you use a file sharing service based on peer-to-peer (P2P) technology?
3.When you see speed problems is the P2P program running on your network as well?
4.How do you notice speed problems (visiting a certain service, downloading emails, etc)?
Youtube won't stream smoothly at night, Xbox Live more laggy than normal
5.If you use P2P programs have you considered running those ONLY outside the peak time or do you keep them running all the time?
6.How many gigabytes is your monthly traffic?