id say with more turbulance and a floppy material it would effect it... more turbulence the less flow the less flow the less air that gets thru to the pod as some form of blockage type affect would be caused by the turbulence... of course this is just one of my rediculous theories to help keep my brain active while doing a very boring and dull job
best way to tell would be to make a solid one... get a high powered fan and sit in front of it and see how much air gets thru to the pod using either.