Can color make that much difference?

[gonfishn]

So I have been fishing (fly) Strawberry quite a bit lately. I have felt like I sorta had it figured out. I say 'sorta' because I was consistently catching a reasonable number of fish, nothing like some of you regularly catch at Strawberry, but respectable. However, a buddy and I were there on 10/6 and found it to be reasonably slow and after about 6 hours decided to head back toward the truck. At the truck a nice gentleman floats by us and told us he had not been there long and he was 'slaying' them with a PINK leech. We then saw him reeling one right after another in. That day my buddy and I had tried white, white and chartreuse, red, black, and brown. We tried different depths, different speeds, we even turned our hats on backward []. Neither one of us had a PINK fly. Could it be that the color was truly the difference between us having a mediocre day and the other guy putting on a clinic? Has anybody even heard of PINK being a hot color at Strawberry before? If it is a secret I guess I'm letting the cat out of the bag.
[signature]