one thing I do not hear you guys discussing too much is the factors of body heat, sweat, condensation compared to waterproof/water resistant. By definition, anything that is water proof won't let water in, but it won't let water out either in the form of vapor, sweat or condensation. Anytime you are exercising you are producing all of the above. This is why ventilation is so important.
Waterproof/breathable fabrics like goretex etc are designed to move water vapor, but under a specific set of conditions that involve low temps ( cold) and a minimal amount of vapor transfer.(low activity) Most of the time that people are getting wet from good quality rain geat it's from moisture that they themselves are generating, not from leakage.
So how do you combat this? Ventilation and appropriate layering. Even if it's pouring and you are sweating up a storm, if you wear the right kind of wicking layer you will be somewhat comfortable. (see veronica's post)
I find that if it's a light warm rain, I just get wet, I hate being inside a rain coat.
irulan
2015 Liv Intrigue 2
Pro Mongoose Titanium Singlespeed
2012 Trek Madone 4.6 Compact SRAM