Lol im not too hot on the theory behind it, but i know for a fact that when i had the long pipe on and filter behind vent, i had a VERY slow throttle response which is what the original poster was on about!
Im VERY happy with mine where it is, and im sure he will be too!
Try it bud, filter on the tube end, then directly on MAF, amazing difference!
Thats why i think i have a happy medium, far enough away and with cold air feed so it gets reasonably cold air, but short enough for rapid throttle response!
Just my 3p