You don't have to get soaked, but it's still useless to try to stay dry. Gear doesn't solve the problem. I own 5 gore-text jackets, 2 gore-tex snow pants, and I forget how many gore-tex gloves. I live in a rainy area, but I don't wear gore-tex when cycling except gloves (and I get the insides wet if I'm out long enough -- I just like the gloves for reasons that have nothing to do with waterproofness). I get this stuff for free if you're wondering why I own so much of it. I use it a lot when doing less strenuous activities, and I also like it for snow sports.

The basic schtick is that you need vapor pressure for the sweat to go through the breathable membrane. When the relative humidity is near 100%, that's pretty tough, though it does work better at lower temps. I can't figure out how SF doesn't get any water in because even with a high quality garment that doesn't leak at zippers or whatever, water gets wicked in and blown in from other areas. In any case, even just wearing a base layer and a regular jersey, I find I roast wearing any of the gore-tex jackets. They're just too heavy, even pac lite.

Waterproof and breathable is possible, and I do like Pro Shell, but there are no magic bullets.