Big book comments and general GRE paper based info request

i was using the prcticing the gre big book . and i am getting results very below than that of power prep’s and barrons computer based tests and also i am having problems finishing on time. it is tooking me about 40 minutes to finish he 38 quesions though 30 miniutes is the time allowed. is there any body who felt the same or is it just me.

and also the reading comprehesions 1 is very long and 1 is very short and they are kind of difficult . is it the same on the currenytly given paper based gre .

i really needs some comments because i am confused on how i should prepare and what to do?

I agree with you in pacing. Even i could not finish 38 questions in 30 minutes. It took me 34 minutes and i was always aware that time is running out. So a few more minutes could have helped. In actual GRE there are 30 q in 30 minutes. So i am also not sure how i should pace myself in BigBook to get a good practice of the actual GRE.