McGonagall survived 2 wizarding wars, and once took 4 stunners.

^The lady is invincible. =D

Voldemort is invincible, you know... Crouch is great. And remember: in the battle of Hogwarts three people dueled Voldemort at the same time and then, he was alone.

I was going to say the exact same thing Delamico ^^

I would say McGonagall and Flitwick are very skilled wizards but Voldemort is in the other team. That seals it really

McGonagall is tougher than she seems^^

McGonagall is old school and isn't Flitwick the professor of charms class