From what I understand having had a quick squiz at their forum is that ch 10 are blaming low ratings for the upheveal, but this is not confirmed. The ratings are down a fraction, but that is to be expected over the Chritmas break and it appears SGU was rating better than Supernatural - although that may be due to the timeslot.

I'm not surprised after what they did to The X Files, BSG and Torchwood.

I have sent an email equiring as to SGU and Supernatural's return, and I will post the reply for you all on Unarchived.