OMG! I love you! Thank you for writing this --- the idea that the Death Eaters aren't any good in 'real combat' because mostly they've just been torturing Muggles (which is like Avada Kedavra-ing kniezels in a barrel^^). I had thought that it a gross unerestimation just how... stupid the DE's appeared in canon, but now I see that canon might have a point. (All thanks to fanon for explaining it to me, though!^^)