I wouldn't call this "crap". You don't know what they did to their phone, how the settings were set.
Did they have their display on full brightness? background activity on? how was their signal strength? did they install apps while testing, downloading and installing apps needs a lot of battery.
did they made phone calls, listening to music while web browsing or did they take a lot of pictures?
You don't know what someone was doing, so you can't really tell if its good or bad.
Everyone has their own opinion about good battery life and everyone has their own opinion what heavy usage or average usage is.
So you can just test on your own.