It's mini, yes.
If you really need one by Christmas, I am able to send it, but I can't do this for all orders (I will have to manually post them). If you have a preorder and don't care about the cost, I am happy to manually fulfill such orders for US$60 including postage (around $10-15 more than if you are happy to wait). In this case, please contact me via email (pe@ppy.sh) with subject "osu!tablet before christmas" with your osu! username and paypal email address.
I have exceeded my time allocation for sending christmas orders! Anyone who sent an email already is fine.