We've also seen the Sound mook outfit, the one that the ninja who attacked Shikamaru and were punked by Asuma. It's different than the mook army's.
Originally posted by RE: Blaxican
Didn't it take all of the Sound Four going into their CS2 forms to defeat two no-name Chuunins? If the Sound 4 were supposed to be exceptional sound ninjas, apart of the same unit as Kimmimaro, then that doesn't bode well for the rest of the no-name sound ninjas. The Sound 4 were barely high-Genin tiered.
The ones they fought were special Jonin, and they did manage to do so without injury and fairly quickly which is kinda impressive.
The two did have names too, even if they don't come up much. Raido, the scarred one, was also the guy who stabbed Kakuzu in the face after Asuma died and helped drive them off.
I would say the four were chunin in skill + jonin-level chakra from the seal, judging from that and their performance against the retrieval squad.
Aside from them, you have Kimimaro, Kabuto, Juugo, sorta-Sasuke, plus Suigetsu mentioned there were several other strong ninja like him wanting to off Orochimaru though it's hard to tell if they were prisoners like him or more like Sasuke in serving willingly. Those're the exceptional ones, the S4 seemed noteworthy mostly in their unity as a group for stuff like the force field jutsu and ability to take the cursed seals.
While clearly not in the level of the big village's, Orochimaru's willingness to do all kinds of experiments as well as attract some followers based on his personal rep, Sound wasn't that bad off.