I too have never had any problems with Nirvana seeds and I've made at LEAST 8 orders with Nirvana.
In fact, I currently have my last two seeds going right now.. that I got from Nirvana.. and they're both doing absolutely wonderful!
I got my last AK48 going.. today is day #2 of week #2 of flowering. She's a hairy women.. LOL. Then, I also have my last 'Ice' plant going as well. She's in flowering as well, but she's only been under the 11/13 light schedule for 5 days as of today.. so she hasn't begun to actually flower just yet.. but she's doing great too. They're both doing absolutely wonderful.. and are healthy as can be.
IMO, sure.. sometimes people will get a bad seed from time to time. It's bound to happen.. and it does happen. Some people just don't get it.. just don't understand.. and get pissed just because something didn't go their way. That's life though.. just have to go with the flow. That's what I do anyhow..
Also, I think that sometimes.. people (especially noobs) will try and act like, because something went wrong.. they immediately want to point their finger and find someone to blame.. except themselves. So, IMO.. I don't think its the seed companies fault.. I personally think its the grower themselves that's making the mistakes.. and instead of taking responsibility for their mistake.. and owning up to it.. they tend to point the finger in some other direction.. instead of taking responsibility for their mistakes.
Just my opinion though.. but i think its pretty accurate.
anywho, peace.