this is an interesting topic...
there's a bunch of people that will tell you to run it hard as HELL and change the oil at 1000-1500 miles, while usually the dealer and the company will tell you to run it light and that it needs a "break-in"...
the other day i was at the dealership and i talked to some salesperson while my car was getting an oil change and we ended up talking about "break in period"... he's pretty knowledgeable about cars and used to race big-block V8s, but anyways, he said the break in period is all BS... that the hyundai parts people tell you to go slow because then in the long run it will wear your engine down if (mainly) the piston rings aren't broken in HARD. He said they tell you to do that because then of course, they make money by doing more maintenance work.
oh, and i ran the car pretty hard when i first got it... it's IMPOSSIBLE in my opinion not to... especially with the 6 speed and the short gears... and i cahnged the oil at about 1500 miles. you want to change the oil early if you break it in hard because there are little metal particles in the oil from the piston rings and other parts that "break-in"... and it's good to get that oil out.