Hermione didn't mind her question being ignored at all and was relieved to figure out what this was about. Patronuses, that was what George had mentioned in the message. It made sense to her, it would be a terribly useful thing to know no matter what.
"Yes, about the Patronuses. The Order used them during the war to warn allies of trouble and such. I once saw Minister Shacklebolt's at Bill Weasley's wedding, warning us that Death Eaters were on their way towards us. It's quite interesting, I think it could be something very useful for the DA."