Just passed 484. Considering I was to lazy to experiment with Servlets and EJBs I'm satisfied. For people with experience it should not be that difficult.
Congratulations, that's still a good score. I think you would need to study the topic areas for this exam even if you have experience, the exam is not that easy.
SCJP, SCJD, SCWCD1.4, IBM486, IBM484, IBM 483, IBM 287, IBM141, IBM Certified Enterprise Developer - WebSphere Studio, V5.0
Author of IBM 287 Simulator Exam