Yea I agree, back when I was racing corvettes and running huge cams etc.. we used custom programming and it was a must haev to make a motor run right.
But for off the shelf stuff like most will be looking to do the Hypertechs and Superchips should help with auto tranny shifting and all round general performance - but by all means - it is not the "real deal" when it comes to a custom tune from like LS2 Edit and a good tunner.
/peace