How long does it take for alcohol to reach your brain?

  I'm at lunch with Arikia at Cafe Tasia on 8th St. She ordered a strawberry mojito and offered me a sip, which I took. Less than 30 seconds later I already felt a buzz. She said that's not possible, that alcohol couldn't make it through the stomach to the blood and to the brain in that short a time.
  She thinks it's a placebo effect. I think it's the real thing.
  Who's right? (Please cite your source.)