Several years ago I heard that the average person devotes less than an hour a year on Financial Planning such as 401k review.   They contrasted this to the same person spends over 4 hours planning their yearly vacation. 

HR Magazine in the November 2009 edition had an article indicating one in three Americans say they have little or no understanding of their Employer-provided retirement savings plans, while three in four say they have less than a complete understanding, according to research from the Hartford Financial Services Group. 

When people were asked what would most help them understand their employer-provided benefits, 36 percent said providing simple materials and 22 percent said having access to one-on one support.