Didn't wait for withdrawl to start Suboxone

I have a question that has puzzled me since I went to the doctor and started Suboxone 2 weeks ago. Everywhere (even the suboxone website) it says to wait until you are in mild to moderate withdrawl to start suboxone. When I went to my appointment I told my doctor that I had snorted 2 oxycontin 80 mg pills right before my appointment. He said you should be fine to start the suboxone tonight. What???? I thought I had to be in withdrawl, he said that "they do not require their patients to go through detox and that I would be fine to start the Suboxone that night". I was very scared of precipitated withdrawl so I asked him TWO more times. Each time he assured me I would be fine starting it that soon. I even checked with the pharmacist and they said that is was probably because the pills only stay in you for about 4 hours........Well I took the suboxone that night before I was in any withdrawls and I WAS 100% FINE! WHY do all these websites say you have to wait and why didn't I have to? Any ideas?????