I used to go to Summerduck all the time. I started going to Old Dominion and consistantly went a few tenths faster with the same setup.
Old Dominion also takes better care of their track and it has a nicer surface. I have seen cars spew s**t on the track and most of the time Summerduck doesn't even stop the cars running to clean it up. I observed that at T&Ts, on race days they did a better job.
Also the no tech, no helmet at O.D. kicks ass