It's not as dramatic for me as you say it is for you, but I have definitely enjoyed the same effect. This winter, all my friends have been complaining with comments of "it's so FREEZING!" whilst wearing massive coats and buried in scarves and hats. Me? I could literally walk around shirtless and feel fine. I don't, though.
My tolerance to the cold is a subtle, yet noticeable difference for me. I notice that if I skip a meal (intermittent fasting), I'm a lot more prone to temperature changes. Food definitely has a role to play here.