I have a question for owners of the 2016 Giant Advance Pro 1 concerning the braking performance with the SLR2 wheelset. I have seen one or two comments on line about the braking being weaker than expected.

To explain my questions, I have been back to riding about 9 months and am a pretty big rider at currently 285 lbs (and going down, having lost 130 in the past year, but that is another story) and live in a very hilly area.
My current road bike is an (awesome) 2015 Trek Domane with RXL wheels. It's rides great and is immensely comfortable with good braking, but not a climber for sure. So I am looking for something more aggressive and performance oriented, that is livelier and more efficient at climbing while more responsive and nimble on descents. I test rode a TCR Advanced Pro 1 for a couple of miles today and was really impressed The other bikes I have tested are the Cervelo R3 and Cannondale Super Evo Six, both also have Ultegra groupsets but aluminum wheelsets.

I have never owned a carbon wheelset before and am wondering if I should be worried about braking performance on a descent if the weather is a little wet. I generally do not ride in wet conditions or rainy weather but there are occasionally times that I do get caught in a little downpour. My first question is if the braking performance would be significantly worse compared to an aluminum wheelset in wet conditions? My second is if there would be any concern about the strength of these wheels compared to aluminum ones for a rider my size?

Thanks for any advice you have!