bubbletop, from an emissions stand point the non-vented cap with a closed PCV is far superior to the road draft tube. From a performance stand point, I don't think you will see any difference, however with the road draft tube and vented cap, you will be subject to blowby out through the vent cap at high rpms. Sure can make a mess under the hood.
Poocho
I had this very same problem when my 09 first ran.
Then I added the PCV and that helpped ,, but the biggest fix was switching out the cheap breather for a good Mr. Gasket one.
never had the problem since,,dq
I should add that I think putting some miles on the fresh engine helped too,,,,