Being tall/large doesn't always mean you can drink more. I know guys who are like 160cm and could out drink almost anyone.
Was once told by a mate of mine (around 5'6"/75kg or so) that he could handle alcohol better than me (6'5"/110) because it was scientifically proven that smaller people could drink more before getting drunk. He ended up vomiting everywhere in his mothers house that night. Pissed on an electrical socket and slept outside. He hasn't tried telling me that shit since.
Agreed. I'm 170 and can outdrink most of my friends. Sucks though - costs me more than 30 pounds before I would consider myself drunk on a night out. I usually don't bother now a days. Or just shot a fuck ton at once... But they always end up the most expensive nights out.