My Power Ratings after Week 4:
Phi 114.6
Sea 111.7
NE 110.1
NYG 107.7
Ind 107.5
Min 105.8
Atl 105.3
SD 103.6
Det 102.2
Den 101.9
NYJ 101.9
AZ 100.9
TB 100.2
Chi 100.2
Dal 99.9
Cle 99.9
Pit 99.8
Bal 99.7
Jax 99.6
StL 98.9
Hou 98.8
Was 96.9
KC 96.6
Oak 96.4
GB 96.0
Buf 95.7
Ten 95.2
Car 93.7
NO 92.6
Cin 92.0
Mia 90.1
SF 90.0
Comments: Subjectively, I would not rate the Giants that high; the spreadsheet has no way of knowing that Favre was out for most of the second half.
The home teams seem to be faring poorly thus far; they are only 31-29, with an average home field advantage of 1.5 points. Last year's home teams were 157-99, with an average HFA of 3.6 points.