I got all credit passes for my standard grades, 4 B's 2 C's with 2 Advanced highers in Maths and Physics and just about to finish my degree and i have just turned 20. The one and only one good thing about the scottish education system(in my opinion) is that you can get plenty of qualifications at an early enough age(some people can graduate with a degree at the age of 19!) I dont like my course at university,but through university i went through 2 years of the Air squadron(taught me so much and gave me valuable life experience!),learning to motivate yourself to study and hand coursework in is soo important. There would no way on earth that i would have had enough life experience/maturity if i applied as a 17 year old. Might have had the enthuasim but lackin the substance.
Hope that is of help