I was worried the new girl was going to have an incredibly annoying voice, but she sounds normal. Her little "kyah!" sound may be trouble, though.
Anyway, I've noticed that, in discussions comparing and contrasting Sensei no Ojikan with Azumanga Daioh, one point that always seems to come up is how the latter has an all-female cast, whereas this show has a few guys...
...Seki and Kudo notwithstanding, that is.