Vanguard provides 401k and 403b plans to over 2.8 million participants and recently released their annual report on plans they manage.   How America Saves provides an analysis of retirement trends and activity.  For example:

• The average account balance for Vanguard particpants was nearly $68,000 in 2005. 
• Savings rates were lowest for particpants under age 25.  This group saved 4.8% of income.  Savings rates for particpants age 55-64 averaged 9.13%
• Women are saving at higher rates than men.
• During 2005 only about 11% of employees saved the maximum dollar amount of $14,000.  ($18,00 above age 50)