Take a bite of your lunch, and hold your nose while you chew. You loose almost all flavor that way right?
I'm noticing the same thing with snuff. If I take too big of a pinch it's like I loose the flavor untill I blow my nose then it comes rushing back.
For this reason I find that big pinches just don't work well with me at all. I like the big nic rush, but it's at the cost of flavor.
Just thinking out loud here. An easy remedy is small pinches more often. Just wondering if it's just me?