Yeah, you're right. I didn't even look at the poster's profile. He's going to have to post a video if he expects us to believe those numbers. No way some high school kid is hack squatting that kind of weight. I remember this one guy I hung out with for like, a week trying to tell me that he squatted "around 1000lbs" in high school. The guy was a huge fat guy, but no friggin way. I was younger and didn't even know much about lifting, now I would call total bullshit on the guy and challenge him to a lift off. I doubt if he could have squatted 315.
If those numbers WERE true, he should be able to DL around 700 lbs.