Next to "What oil should I use?" and "Which is better synthetic or dino?" this has to be the next hottest oil topic?

The arguments are...

Engine needs to be broken in.
Opposition says new engines are already broken in from factory.
Synthetic oil will seep through the rings because they have not seated properly.
Rubbish say the opposition a 5W30 is a 5W30 regardless of it being a synthetic why would it slip past the rings?
Synthetic oil does not allow rings to properly sit. Hogwash says the opposition remember we believe that the engine is already broken in from factory so bah!
Other people say get that crappy OEM oil out of there as soon as possible, it has engine bits and crap in it also its been sitting in your car since the factory sometimes for months.

Personally I think the number one problem is excessive acceleration and abuse during the first 5k miles that causes problems in the long run. Some people really go at it with their new cars after a very short while