It turns out that a martini shaken – not stirred – helps deactivate hydrogen peroxide (an antioxidant) better than gin or vermouth alone and twice as effective than when stirred. This is important because 007 is a tough old bastard, and part of his health may be due to competent bartending.
Never you mind that Bond ordered a total of 19 vodka martinis to 16 gin ones in the original novels, or that he (and Fleming) both enjoyed bourbon more. And don’t even start on that fruit cocktail/booze abortion of a vesper.
If anything, this should just tell you one thing: have a goddamn drink, already.