Pick 'n' Mix Seeds UK : White Dwarf not germinating... bad batch?

Hi, just recently had a small seed order from Pick 'n' Mix (www.pickandmix.co.uk). I got 7 seeds in total:

2x Russian Rocket Fuel
2x Himalayan Blue Diesel
3x White Dwarf

I also had 14 other seeds which I germinated at the same time and every single seed apart from the 3 white dwarfs popped and grew healthy taproots within 72hrs (paper towel method). It's been 7 days now and the 3 white Dwarfs haven't done a thing!!

I just wondered if anyone else had purchased any of these seeds from Pick 'n' Mix recently as on another forum 1 guy said he bought one White dwarf at roughly the same time as me and it didn't germ either. I'm starting to think they have a bad batch of this strain and I got given some duff seeds.

So if anyone else out there got some of these seeds recently I'd be most interested to see how they got on. I hate paying good money for seeds that don't do a thing!

Sometimes seeds get made to good in the plant and have a really hard shell, Take a medium grain sandpaper and scuff the seed real lite on the bottom tip of the seed, If u have germinated before u can tell what end the taproot pops out of on the seed thats where I scuff it and have had a 100%succes on all my fem seeds, Except for the one I didnt try that on and that went Into the trash before i knew this method,Slapped myself over it!

Adding to that after scuffing them let them soak in straight mineral water till U see a root pop out then put n soil.

I'll have to remember that. I have a Buddha White Dwarf I was thinking about starting soon.

So How did It Go man.