I keep hearing people talk about 5mm mod1 pinions that AREN'T hardened - and ever since I heard of this site I've never seen them available at the store here. I got the only ones available through the RCM store, which yes are definitely hardened:
If you still don't believe me and think I somehow chose 'non-hardened' from that list, I'll PM you the order numbers and my email address so you can have a look at the receipts in the 'order tracking' section.