I dont know the quarter mile time of a 250 but last summer at the track there were quite a few bikes racing and here are the times.
I dont know what they had done to the bikes if anything these are just their times.
Yamaha yzf600 9.8
yamaha yzf1000 8.4
then there was a Hyabusa turbo that ran a 6.2 so to answer your question yes they are faster than your civic.
I raced my friend, I have a 2002 civic and he has a 00 honda CBR600rr and he beat me by at least 15+ cars by the next light and it wasnt even a quarter mile.