Idk, I put on a K&N FIPK cold air intake, and it felt better. I dont think its in your head, every car responds differently to bolt ons. Cold air intakes arent a waste of money, they do free up some power (more so the pvc ones) they flow better then the stock.
Besides the blower, the thing I noticed alot more power from, was the o/r mid pipe. It felt a lot better. Then when I took it off for emissions, the car felt a lot slower.