I don't think it's coincidence either. Unless you've tightened up your overall scent control strategy.

I bought a set this year as well, and while I haven't seen enough significant evidence, (I just haven't been out much as yet) I have had deer down wind that weren't alarmed. One was for about an hour and a half, w/in 20 yards the entire time.

BUT, I noticed alot of that last year when I changed over to Dead Down Wind. The jury is still out for me, but I'm continuing to use it.