Well I am connected the whole day since apart from the normal computer, there is also the blackberry but that is more for email communications. Mostly it is for work.
I put 6-9 b/c i have it at work and i take breaks and look...and by the time you add up before work, during work and after work i think it would add up pretty close to that~
I only do 1-3 hours a day. I use my hands and wrists alot at work so if i spend alot of time on the computer the side of my right hand starts to bug me. I try to not get too addicted.