I firmly believe fish are stupid. I also believe that if you show them a fly that looks sort of like food they are thinking about, they will eat it. So it should even out.

As for Kerry's thought on presentation being the key, I would offer a counter experience. Not that I disagree with him, but the river gods have their own senses of humor. I once hooked (and subsequently landed) a steelhead while standing in the river, rod tucked under my arm pointed behind me and drowned dry fly swinging below me in the shallows, while listening to a man tell me how much trouble he was having getting a grab from a steelhead. I have yet to perfect that presentation, but it has happened to me on several occasions (with trout) since.