today i have passed the SCJP 6 Upgrade exam with 83%. It has 48 questions, you need 66% to pass (32 correct answers) in two and a half hours. I have to say I was really surprised how hard the exam was. For those who are planning an upgrade exam: to prepare you have to study the same material as for the normal exam, with paying extra attention for the newer stuff. I used KB book (great), ExamLam mocks (very good), and Enthuware mocks (ok). It took me approximately month and a half to prepare. Don't know if there's much difference between normal and upgrade exams, it didn't seem like that to me. I'd be very peeved if I got between 58 and 66 percent. Studying in the evening and on weekends, it was tiring. And having passed the exam in the past, I had expectation that I should pass. I can't say that I was really happy at the end, more relieved that I didn't fail. Weird. Before the exam I used the same method I used at the uni and it always worked for me: day before the exam I give myself a day off and let the knowledge settle in. What else? Don't panic, and keep fighting with each and every question they throw at you.
At the end, I'd like to thank this wonderful community, it is great having so much good information on your disposal, and so many helpful members. Best of luck to all who are preparing, Merry Christmas to all who celebrate it and Happy New Year to all!