Is that the common idea? I thought people gravitated toward warmer fragrances in the cooler months for the same reasons they gravitate toward warmer fabrics - they're cozy, comforting, and warming. To me, resinous, ambery and spicy orientals are the cashmere sweaters and woolen blankets of the fragrance world. And in the warm months I generally prefer something more cooling and refreshing, like bright, astringent greens. At least that's how I think of it - it's got nothing to do with projection, as far as I'm concerned. I have lots of fragrances I wear in the winter that don't have any projection to speak of, but they do tend to have longevity due to heavier bases.