funny you mention that hhhg,
I had given a friend some homemade g13/nl5 haze or g13/NH mix seeds.
ive never smelled a plant like this before, but it also smelled just like roach spray.
I didn't get to see it finished, but im sure there are plenty more of those to find, not that im looking for them at all, not at all. dude said it was decent though, so maybe it didn't taste like it smelled after it got dried and cured.
as far as the g13, I only have experience with dr g's g13, so I don't know if that counts, but it seems like it is what it is supposed to be.
maybe its just some pure afghani type, an old guy that's a friend said it reminded him of black afghani hash taste.
there were basically two phenos I saw, one was dense and one was a little fluffier and taller plant.
only stretched 25-50% depending on pheno, the denser one stretched less. not very fragrant while growing, nothing to get you in trouble but its a slight green nutty resin smell. the plants I saw liked around 63-70 for the shorter denser ones and 70-77 for the taller fluffier one.