Thank you Tomaz, that is re-assuring. I've also spent a lot of time researching similar experiences on the web and the closest to mine is an incident at a Toyota dealership (http://forums.vwvortex.com/zerothread?id=3245182 ) the difference being that I never drove the car at all. I was surprised this happens quiet a number of times at dealerships and quick lubes from the number of hits I got from my search. So, people, make sure you check for oil level after an oil change has been done. Of course, there's the chance the tech may realize the error and fix it and, naturally, the customer wouldn't know what happened! At least in my case I know since I did it myself!

Today I'll drain and refill. I'll do this one more time and keep some of the drained oil to send to http://www.blackstone-labs.com/ for further analysis. I'll also have compression tests done to make sure all's fine. So far the car seems behave just fine if not better as a result of the fresh oil. The old oil was very dark and the filter almost gone.