We had a candidate in our platoon that got 7 pullups was second to last in the run ahead of a injured candidate and im not sure about situps, but came out to around a 209 final pft. He graduated without going to the boards. At this point with a combination of other things throughout OCS I started losing confidence in the whole screening process. Thankfully there is still TBS.
The guy's age might have been a factor. He might have had a 1st class PFT if he was over 27 (someone back me up if this isn't the correct age). If he was younger than that I am shocked that they let someone graduate with a sub-1st class PFT score unless he had a broken leg or something along those lines and was just tough as nails and wanted to gut it out (and the staff let him).
Keep your faith in the screening process, it does a good job. There will always be those "special" few, and typically their PFT scores will be the least of your worries when you have to work with them.