I'm taking US History II tomorrow and was wondering if the CLEP Official Guide is really representative of the exam. The reason I ask, I'm able to bang out 70-90% while taking the IC sections, but scored a measly 50% on the official practice exam.

Should I be concerned?

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Pass/Fail Record 11-1

Last 4 Exams
DSST Public Speaking pending-eminent failure (Sep 2006)
DSST Principles of Statistics 66 (Aug 2006)
CLEP Analyzing and Interpreting Lit. 56 (Aug 2006)
DSST MIS 69 (July 2006)

Upcoming Exams
DSST Technical Writting
ECE English, maybe...