No dis on Jimmie, but it's a combination of everything.
If Jimmie wasn't with Hendrick Motorsports, do you think he would be competitive at all?
Jimmie's a good driver with THE BEST equipment and one of the best crew chiefs. Look what happens when Jimmie runs the Busch races with some other crew chief - he doesn't even place top 5 (with Hendrick equipment). Look what happens when Jimmie doesn't have Hendrick horsepower under the hood, he doesn't even run top 20.
There are several drivers who would be able to win multiple championships with a great CC like Chad and with Hendrick Motorsports.
I can think of 10 or 15 drivers could win multiple Cup championships with Chad Knaus AND Hendrick Motorsports.
Jimmie, Chad and HMS is NASCAR's equivalent of the New England Patriots.