I've only blown once. It was after a 4 beer in 3.5 hour get together with friends... I wasn't drunk but could feel a bit of a buzz.. Nothing serious... Anyway, I blew .025.
I don't know if it's linear but now that I know what .025 feels like, I shudder to think what kind of fool would consider driving at .08...
The good news is that I know if I stick to my personal 'rules' (established when I was a teenager), I will never blow over.