Yep. Allen, however, looks like a total dork with that hairstyle, and we know it's not permanent (Allen didn't seem too happy about it, either).
I do have to wonder why Lenalee didn't do anything more than stand around once something happened to her, but then again, maybe she was just a little dazed from the potion. Wasn't that a sweatdrop in the panel below? ^_^;; On the other hand, Bookman had an expression that he would normally not wear, so maybe not.