Actually it looks like INEC has awarded the elections in Edo, Kano and Ondo to PDP. So much for my theory. Thanks Nkem of African Shirts http://africanshirts.blogspot.com/ for the link to the regularly updated Reuters website http://africa.reuters.com/nigeriaelection/results/regional.html
By contrast, the INEC website is still saying "No results available. Please check back soon"