Wow. I've had the opposite experience so I want to make sure the other side gets heard. Grown a number of Nirvana strains including AK48, Bubblelicious, and now Ice. Never had a problem germing-- at least 9 of ten each time-- in fact I can't remember losing any.
Re: AK48-- the one plant kept as a mother is rock solid. 18" plants yield over an oz. each time. Sweet fruity smell. Flowers EXTREMELY fast (hence the "48" as in "48 day flowering period"-- the plant btw has apparently no relation whatsoever to AK47 except a play off the name) and sticky sticky sticky. I have a friend who refuses to smoke anything else now. It's a staple.
Re: Nirvana-- Grown plants from Greenhouse (WW), Seedsman (WW, orig. Haze), G13 (Pure Gold), and KCBrains (Leda Uno) along with a landrace Afgani and a bunch of local bagseed. The Nirvana strains are easily on par with the other breeders. My least fav. of Nirvana is Bubblelicious only because the buzz feels like a sedative. The worst I can say about Nirvana is that the strains sometimes lack uniformity-- but never had a problem picking a few real winners out of a batch of ten. And as a matter of fact the Seedsman WW was the worst for this; had phenos so different I couldn't believe they were the same strain.
Re: Germing-- It looks like your method is sound (use a variation of paper towel method too here) so maybe you were just very unlucky. I'm usually skeptical about complaints about germing. Unless seeds are VERY old or somehow mistreated it's hard to make seeds that won't germ under the right conditions. The few times I've had whole batches that wouldn't pop I sooner or later realized there was a crucial error on my part (like when I cooked them instead of warmed them). Also, in my experience, when they crack but the tap root never comes out strong it's been because of a fungus or something. With a loupe I could see a slimy sheen on the seed casing and the start of mold.
To OP: Good luck with the second attempt. I hope you get satisfaction regardless. I know how it feels to do all the waiting for nothing.