I notice that a 20 mile ride in the winter took the effort of 60 in the summmer and learned not to be disappointed in "doing less." It's all about the layers, though I didn't have Gore-Tex until somebody gave it to me this year. On the coldest days I'd wear something wicking and a long sleeved t shirt and a sweat shirt and two jackets on top; three layers on the bottom.
The Gore-tex is wunnerful, though, especially on nasty rainy days. It's really nice to show up at work sort of almost dry! Before I'd have clothing draped over my computer (ever so carefully) hoping it would be warm enough to dry it out without overheating the 'puter...