The reason Area G tends to struggle at the SMC or even BOA, if they attend, goes to the old saying "Money buys you Championships."
Now I absolutely hate to say it that way because every band at the SMC has a tremendous amount of talent but when you compare Area G bands to the bigger more affluent bands such as LD Bell, they don't have the resources to bring out major props or LED screens. Just looking at the demographic of the schools that are in Area G, outside of Bexar County, they come from less affluent areas than those of the other bands at the SMC.
Now in the end I don't think this is the major contributing factor to the under representation of Area G in the Finals but it is something worth comparing. All of the bands that were at State were amazing and it is truly awesome the product Texas puts out. there!