I've been tracking this across the way with poster STLfan. Basically its taking the Statfox power ratings and comparing it to the spread.
Its been doing very well for the 6 days I've been tracking it.
Here's the stats:
Thru 6 Days:
---- All ---------/ Diff 2&up
NBA 26-15 63% / 16-9 64%
Favs 12-7 63% / 6-5 55%
Dogs 14-8 64% / 10-4 71%
Wrong team favored category is 3-0, with all 3 dogs winning outright!