Brian:
I am always surprised when I go back overseas and see how narrow some of the fairways are.
Then again, with a few exceptions duly noted, the rough on those links is much thinner and it doesn't matter so much if you're out of the fairway. In America, the rough is thicker and more uniform, and even they're cutting the bluegrass at two inches, it's harder to get your clubface on the ball than it is overseas.
One of the advantages that "classic" courses have over modern courses is many years of maturity and adjustment of the edges of the course. The Brits have had 100 years to get the shrubbery cut back to make the course playable. On new courses, we are likely to overcompensate and clear wider than we might, because if players are losing too many balls that first year, the course is branded as unfair and it will take a long time to overcome that reputation.
Of course it is easier to keep the fairways narrow if you have cool native plants to work with in the roughs, instead of trees. Look at Bandon Trails ... the first and last few holes are fairly narrow because they knew people could find balls off the fairway. The holes through the trees are probably twice as wide, partly because you need sunlight on the fairway and those trees were big, but also because it wouldn't be looked on too kindly if visitors were hacking their second shots out of the trees.