Question about the K&N typhoon intake

[Rori]

So I just put in my K&N typhoon intake system recently. I understand that they are not as good as long tube CAI but I didn't want to go through the hassle of removing the bumper or making cuts that would be needed for the Stillen CAI. I was told yesterday that by putting in the K&N typhoon system I actually lost performance because it would essentially be a hot air intake system with it being under the hood like it is. Is this a true statement? Did I just waste a bunch of money on something that decreases performance?

I apologize in advance if this a noob question.