I also got a boy drinking tons of Lipton Citrus Green Tea.
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Remember, it's not the presence or absence of a particular food - there is no magic to it. It's how the food in question reacts in YOUR body to send a message about which gender baby has the best shot of survival.
If your body "thinks" times are good and mama is large and in charge, you'll be more likely to have a boy regardless of coffee intake. If your body doesn't tolerate even small amounts of caffeine well and (much more likely) you're diminished in condition for other reasons entirely, then even moderate caff intake may be too much for you to conceive a boy.