For five years I've read all the sections, but never posted, replied or anything - until now.

I came closest to posting when the victim of a GM's plagiarism, who dared to complain, was bullied by some subscribers... but like too many of us, I joined the muted shame of the silent majority.  

For five years, I've listened (especially to MNb!), learned (from everyone!), and laughed (especially at the "Anonymous" rant thread about Marin's book). All in all, I must say we're quite a group.  

I'm barely FIDE 2000, but have used sharp opening ideas in American Swiss events to beat, with the BLACK pieces: GM (Dmitry) Gurevich, IM Hungaski, IM Bonin, and GM Kudrin (I promise to post that novelty in the Dragons section).  So I do actually have a lot to offer others here - but right now I need your help...  

As an active/tactical KID player (for 5 years), I'm considering switching from Gallagher-variation-style play against the Fianchetto, to the 4...c5!? ideas advocated in the "Attacking the Fianchetto" chapter of the new "Dangerous Weapons - the King's Indian".  

The idea is not to get to a Yugoslav or English, but instead "to sharpen the play and force White to think concretely from the very outset" (Dembo).  

What I need is the benefit of the experience of anyone who's played positions, from either side, of the lines being recommended by her.  

If you don't have the book, the critical lines seem to be, after 1 d4 Nf6 2 c4 g6 3 Nf3 Bg7 4 g3 c5:
a) 5 Bg2 cxd4 6 Nxd4 0-0, and now either 7 Nc3 Qc7!?, or 7 0-0 d5!? Grunfeld style.  
b) 5 d5 b5!? 6 cxb5 Qa5+!?  

Specifically, what I hope experienced players can tell me, is:  
1) What can I expect as Black?
2) Does White "avoid" this line?  
3) What kind of trade-off's will I get, for what I have to learn, vs what my oppenents already know or do?