As it has been for many years, it seems that only the Columbia area uses the two-man system. I know here in Charleston, only North Charleston High School chooses to use a two-man system b/c schools here have the choice to use a two or three-man system. I have heard that even they are going to a three-man system this year. I know when we go to play in the Greenville area, and when i was a player there, we always use the three-man system. When we go to play at Waccamaw in the Myrtle Beach area, there is always a three-man system.
I am not sure if it is a money issue or an AD decision or school choice, but it seems that only metro-Columbia schools and tournaments use a two-man system.