For US schools, the following thread might be of use:108-t41568
Regardless of school region though, it seems like the school-supported loan programs are probably the best options for now.
In the USA at least, I have been getting interest rate quotes for private loans exceeding 10%, even with top-tier credit history. However, for some schools in Europe (such as LBS and INSEAD), the American government has loan programs (Stafford/GradPLUS/etc.) that are available to US citizens or permanent residents. And LBS has the HSBC loan scheme.
So in the end, it will probably depend on the school you attend (and what loan schemes they offer), along with any government-supported loan programs from your home country, if any. After that (and grants/scholarships), the private bank loans are probably a more distant option.