かがみ「あの子、最初は張り切るんだけど、だんだんバテていくタイプだから…」
こなた「あー、いるよね、そういう子供傾向強い人」
かがみ「あ、また来た」
こなた「飽きるんじゃなくて、もたなくなるんだよね」
Kagami: She's the type to start off excited, and eventually get exhausted
Konata: Um, right, some people have such childish tendency
Kagami: Oh, she sent another
Konata: Those people are actually not getting bored, rather they just can't keep it up
Original words and my own translation, from ep 10.
Konata is so insightful, I'd say.