I've checked multiple sites (NFL.com, CBSSPORTS.com) and they say the same thing. Aaron Rodgers has the highest quarterback rating in the NFL after Week 8:
Top 10 QBs---------------Rating
1 Aaron Rodgers------------110.4
2 Peyton Manning-----------109.3
3 Drew Brees---------------107.6
4 Brett Favre----------------106.0
5 Donovan McNabb---------103.2
6 Ben Roethlisberger-------102.6
7 Matt Schaub---------------100.5
8 Tom Brady------------------99.9
9 Tony Romo-----------------96.8
10 Phil Rivers------------------95.9
I'd trade it for some wins (and I'm sure Aaron Rodgers would also), but still congratulations are in order. He's thrown 14 TDs and only 2 Ints. And to be doing it with the protection he's had so far this season (31 sacks) is simply amazing (only 2 other quarterbacks have more than 20 sacks--Cassel (KC) 23 and Russell (Oak) 24, not the kind of company I'd want to be keeping.
3 QBs hav 16 TDs and 2 have 15, but none of those have as few Ints as Rodgers.
Woo hoo!
http://www.nfl.com/stats/categorystats?tabSeq=0&statisticCategory=PASSING&season=2009&seasonType=REG edited to add link