In a world where people are constantly fretting over half-point 'hooks' and two point line moves, it's worth noting that today's NFL spreads were 'off' from the actual results by 26, 20, 15, 18, 0.5, 39, 13, 8.5, 0, 1.5, 10, 17 and 2.5 points. Nine of thirteen games finished two or more scores from the 'predicted' spread.
More importantly, this isn't unusual.