When the Chicago Tribune put the recipe to the test, they shook on a little MSG after it was fried and did not put it in the spice mix. I know several have commented on the pressure fryer the stores use, but in the video on the Tribune news page, they used a regular "old school" cast iron pan.
Also a user in another forum posted a version of KFC gravy using the seasoned flour from this recipe:
1T butter
1/4c seasoned breading flour
All the cracklings strained from oil
2c chicken broth
1c milk
I have not tried it, but it seems reasonable....