If you take it easy, no hard acceleration, no hard stops (unless emergency of course), vary speed, stay under say 50mph (your choice, but not fast), you will most likely be fine. The goal is to give the mechanical pieces a chance to break in before putting them under heavy load. If everything is perfect, it really does not matter, but we know not all is perfect and letting things get broke in a little before pushing them hard will help... usually. This does not mean that you will have or not have problems.