Got these today. Dropped all 10 in a glass of water.
Well so far I am at 5 out of ten with tails. They weren't the most mature looking seeds but sometimes that doesn't matter. The 5 best looking ones popped and the 5 smaller greyish white ones have not. I am pretty good at popping seeds if you go back through my logs you will see mostly 90% plus. Anyway I will keep trying with them they could still hatch.
Not pissed at all of course the breeder wants to see as many plants as possible tested. I want to give a good effort since the seeds were free. Got another one to go so I am up to 8 now. The last 2 I gave a little help as they didn't want to crack properly even after soaking. Still might get more to fire off.