They apparently did; but seemingly only in the German media. At the LH press conference yesterday, one of the questions (in German) was on this very point - raising "concerns" that these passengers - belatedly, of course - reported.

It was mentioned here, in passing, yesterday.

But I think this is a non-issue. What level of contact does a passenger have with a First Officer? To say they noticed strange/odd behaviour seems a little unconvincing. And, apart from that, there is no story - except that they were incredibly lucky. But on that point, it's the people who were booked and changed/missed their flight only that usually get a mention.