Yeast wash with cold water

I washed some San Diego Super Yeast this weekend. I was in a hurry and forgot to let my chilled boiled water come back up to room temp. I added about .5 gallons of water that had been in the fridge (probably about 40deg) to about .75 gallons of trub/yeast slurry that was probably around 65deg. I'm slightly concerned that temperature shock may have killed some good yeast cells, but on the other hand, my guess is that the temp dropped at most 10-15 deg once mixed, which doesn't seem too bad. Wanted to get confirmation that I'm worrying about nothing.

I do have the harvested yeast in my fridge now.

I love super yeast! You will be fine, and that looks like some good washed yeast.