Definately caught the episode, I love Grey's! I think they did a great job (besides the Pulmozyme, I said the same thing to my mom, "who carries that around in their purse?") Of course in the end I wound up snuggled up to my mom and my dog crying. My best friend texted me that she was crying too! (Love her!)
The most impressive I think was their coughing, seriously, they sounded quite realistic. Grey's and Private Practice always tend to do a good representation of CF, I think. Anyways, had to come on here and post!