edward,
I believe many would really like to do their racing at sepang but sepang is too far, and it costs about RM150 per car for about 3-4 hours. Further more, the toll is about RM5+ (has the price increased?) per trip, making it RM10+ for toll charges to go and come back. Not many people have RM150 to spare. During those old days, Batu Tiga circuit is only RM60 (correct me if I'm wrong) and that's more affordable to many but Batu Tiga has been demolished. On LDP, most of the speedsters will be out there from midnite onwards. If you drive often enough on LDP after midnight on friday night, saturday night, you'll see some cars speeding along. You may even spot my car too. hahahaha