Gaara's a jinchuriki, but most of his power is just him. Probably. Except when he's in partial or full on tailed beast form. He killed a few guys during the forest part of the chuunin exam, and later a few ninjas who wanted to intimidate him because of some betting bull****, both in less than a minute (allowing for dramatic pauses). There's also a bit around the same arc where asuma takes down 9 ninjas, also in less than a minute. Naruto ninjas aren't slow at killing, it's just that important battles are all going to be anime-esque.