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A bachelor's degree is three years in Norway. Some employers may have a problem with that, some won't. It will depend a lot on what you want to study whether it will transfer easily to the US. Nursing, for example, will not transfer. Nurses are far more advanced in the US. With anything that requires a license or accreditation, you'd need to check with your state's accreditation agency before comitting to studies.

With the exception of ex. Phil, it's true there's no general education, however, three years /= a master's degree even in engineering. With a lot of courses you still have plenty of fluff. Usually some history of your profession, communication or other such nonsense.

The most important things you need to know about Norway are that you have to either have a year of uni or a certain number of AP classes, pass the Bergenstest (Norwegian language) if the course is in Norwegian (and nearly all undergrad studies are), and you'll have to show you have enough money to support yourself in order to get a permit. Currently that's NOK 94 400/ yr, but that goes up annually. There is no requirement you have an IB.