I'm thinning at my widows peak, diffusely. I've noticed a few things:
1) Putting too much gel in my hair makes the thinning more noticeable to me, whereas if I just put a dab in, I can hardly tell.
2) oddly enough, when my hair gets longer than 1.5", I can also tell moreso than when it is short. But I wear the front of my hair sort of pushed together toward the middle, so that more hairs bunch toward the peak and cover it.
That's all I've got. But since it is cheaper to play with different styles, vs. different shampoos or whatever, I recommend giving it a try (much like the suggestion in the HairLossTalk.com newsletter).
Good luck guys.