Jayco23FB - you will find lots of opinions on K&N here, and most of them not favourable. If you want a more balanced viewpoint, look elsewhere. You can PM me if you want my experiences - flat panel or CAI.
Just understand that, as with many things on the Interwebs, there are so many variables that cannot be proved or disproved as to render most of the information useless.
Last thing I would say is that people who find the K&Ns useful probably have better things to do than tout their virtues especially since K&N pays them zero dollars for advertising their product.