Mainly but not exclusivly.
2.Do you use a file sharing service based on peer-to-peer (P2P) technology?
Yes, only a tiny bit.
3.When you see speed problems is the P2P program running on your network as well?
No. and it makes no difference as the p2p is so gastly slow anyway.
4.How do you notice speed problems (visiting a certain service, downloading emails, etc)?
Anything international, specially streaming content.
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?As above, hardly use p2p
6.How many gigabytes is your monthly traffic?
average + - 8GB.