Nah:

1) Jolla's been showing off tablets running Sailfish since the spring, and they even sent tablets out to developers a month or so back. There's no reason they couldn't just send the final tablets out with this software.

2) With the Phone, Jolla already has a fully-functional and well-tested online update mechanism. So end-users can update the OS themselves.

3) As we've seen, the twitter reports from an early user shows her immediately pulling down software updates for her tablet.

So yeah, the only thing holding back Jolla tablets right now has to be related to actual manufacturing issues; there's nothing else really blocking the devices right now.

EDIT: Ah, I am informed that I applied the wrong gender for Chung Hoi Ching. My apologies!