Yes, it really is. Dumbledore had been evasive in life, certainly, even to her, but he'd never actively avoided her like this. They'd had something of an understanding, she'd felt, but that understanding appears to not extend into death.

"Oh, I have been no stranger to oddities at this school. Strange and wondrous, and somewhat unsettling, but at the moment there appears to be nothing to be done but continue on as we've been," she says a bit briskly. "Though I cannot quite imagine what might be going through your head when you find a younger you in your classroom. ...you'll tell me if you run across a younger me, I hope." The horror.