I don't have any rifles with synthetic stocks and I never will.....all walnut and blue steel. I have hunted in aweful weather (snow, rain, drizzel) in Northern Idaho and never had a problem. Of course all my stocks are glass bedded and sealed. But the main reason is just taste...only walnut and blue "looks and feels good" to me.
Barstooler
Since I started elk hunting in 1982, there have been a lot of years where it was raining or snowing or snow was melting and dripping on me from the trees. My firearms have been soaked, dropped in the mud, dropped on rocks, smashed between my ribs and a log when I took a spill from a mule, and generally subjected to various kinds of indignity that I would not want to subject a quality wood stock to. That said, most of those indignities were done to rifles with wooden stocks. As a result, most of my rifles now have "character marks" acquired over the years.
While I prefer the looks of fancy walnut from a purely aesthetic standpoint, I find myself buying more and more firearms with laminate, synthetic or plain walnut (no fore-end caps, etc.) stocks. Since my firearms are hunters rather than collector items, I am more interested in function than aesthetics. Laminate is stronger than real wood and has a much lower propensity to warp. Synthetics like the McMillan stocks can be very strong, stable and light, they take a beating well and are easily repaired - nothing a little filler and a new paint job can't fix.
Plus, I have to admit I really like some of the laminate color schemes and some of the camo paint jobs I've seen on painted synthetics. They may may offend some, but their functionality is hard to beat. The only qualifier is that I'm talking about quallity products, not the cheap, flimsy synthetics offered on some of the rifles available.