a 19 yr old mexican , i doubt he's heavy set , so 5 beers is allot .. and it takes several years of hard drinking ( somthing very possable at that age ) for your tolarence to go up ... the catch is , even hardened alcholics that dont get drunk off what would make most of us call it a night still have slowed reflexes , just they have them ALL the time.
it does show the differance in culture .. a judge here in the US would need to pick up his jaw before tossing the kid in a cell if he said he didnt loose control of the car because he only had 5 beers ( not to mention the sanctions to his laywer for even letting the kid say that )