Should Nascar investigate Hendrick Motorsports?

With Hendrick drivers dominating every single COT race this year, should Nascar step in and make sure they aren't doing anything they are not supposed to be doing? For one team to run so well in the "new" car, something has to be going on. Granted, Johnson and Gordon are both former champs, but come on...4 out of 4?? And for Kyle Busch to be running up front every race, they have to be....I don't want to say cheating...but bending the rules some how or another. Or is Nascar loving it, and getting exactly what they hoped for?