Just from personal experience I find that I am much more sensitive to carbs when I am leaner (< 10 %) than in my upper range of bodyfat (12 %).
I agree with you Gabe. One of the things I really want to write about on abc is insulin, insulin resistance, bulking etc. Literally break this subject down like we have done for protein. This has been on my mind for years now. And I think we have the scientific prowess on our site to team up and get this job done.