Like pre-listing home inspections, home staging is becoming better understood and encouraged by Realtors for properties that are somewhat "lacking".
Shows like HGTV's "The Stagers" have really helped consumers see exactly what a professional Home Stager can do for certain properties. Some of the before and after pictures are amazing.
Statistics from 2005 show hiring a Home Stager can reduce a listing's time on the market by one-third and can increase the selling price by 10-15%.
I doubt those statistics still hold in the present market. Though I suspect a professional home staging will still have a positive impact on the selling price of most properties. At minimum, the cost of staging will be recovered when the property sells. I don't see how it could hurt.