I asked Greg that in his thread, and he said that he changed some of his own recipes for circuits etc, and you can still disable them to use the original recipes.
So before it was "recipe A if disabled in config, else recipe B"
and now it's "recipe A if disabled in config, else recipe C"
That's just my understanding from what he said, I haven't actually tried that version.
Also why does GregTech get so much flak for nerfing things? Forestry and Railcraft, among others, have been nerfing things for quite some time. GregTech is just doing it more quickly.
Their own stuff, mayhaps, but i don't remember any forestry nerfs for anything outside of forestry, or any railcraft nerfs for stuff outside of railcraft. CAVEAT: With RC you can still argue that it changes vanilla recipes, and thus that it's a "nerf", but i don't remember anything forestry remotely similar to that. RC also only changes rails, which, frankly, aren't used a lot anyway, and when you do want them, you want a *lot* of them, and then RC gives you much better yields...