That has been my experience and I have really tested the limit doing shots. Maybe drinking good stuff straight has something to do with it.
That must be the secret. My experience has been with Cuervo Especial for the most part, but I've sunk to drinking vile potions such as "Potter's Tequila" on a few occaisions-- think I would have enjoyed sterno about as much and had less of a hangover.
I'll get a bottle of Patrón one of these days and try it.