Question about ceramic rotors

I didn't know really where to put this, so I thought here.
I got caught saturday in that crazy snow, and when I went out driving today, I noticed my stopping power on my ceramics is not as strong as before the snow storm. Always when I would just barely tap the car would immediately stop with such force. Now I have to push the pedal maybe 1/4 of the way down to get the car to really stop.

When I put it in reverse and stop, it's sudden and quick with just a little tap. I'm wondering should I take my car to the dealer to check out the rotors? I know some people say if there is a pebble caught between the pad and the rotor it will cause damage. I don't feel any noise or gravel feeling from pedal when I push it.

I noticed when I got home my front wheels were completely covered in snow, even inside the rims. My brake caliper was completely covered in snow. The rotors were clean though. Also the rear wheels were completely clean to for some odd reason, just the front were covered in snow.

Is this in my head or should I be worried?

 

I have had a number of Carbon brake cars arrive for service that just don't stop.
Drive it and do some really hard braking to get heat into the rotors and see if that brings them back. I actually did this to one car and the customer drove right back and said the brakes were grabby. I explained that he had never experienced the proper brakes, (pre-owned and not from a dealer) and this was normal. he drove away and reported much better brakes that he never knew before.
Light braking or just over cooled by the snow will cause glazing and a good heavy braking heat them up will get it back.
Try and see.