1) Do updated homes sell faster, and 2) do staged homes sell faster. Clearly a seller can do one or both.
One helpful way to approach this is to think of yourself as a buyer. Would you be more likely to buy an older home with updated kitchen and baths than one that's still "original"? You would probably pay more for the updated home. Would it be more than it would cost to do the updating yourself? Do you want to have the grief of updating, along with the expense? In my experience, updated homes sell faster.
As for staging, it is a real improvement over a totally vacant home. It's hard for buyers to imagine how nice a home would be like with furniture in place if they're looking at a vacant room. In my experience staged vacant homes sell faster. Think like a buyer again. Two identical homes, one vacant and one staged. Which one will go first?
The important question you didn't ask is about COST of updating or staging. Read my blog post answering that question at http://bit.ly/pzoo61
However, in the real world, no two homes are alike in a variety of ways, and the buyers looking at each home are never the same. Consequently, it's virtually impossible to control all variables to the point where a scientific conclusion could be drawn about how fast a "staged/updated" home will sell in relation to another home that is not staged/updated.
You can find plenty of allegorical evidence--mostly from real estate brokers, home stagers and contractors--that staging or updating your home will help it sell faster and for a better price. However, I know of no scientifically derived statistics that back this up.
That said, given the current residential real estate market in Lake Oswego, I would offer the following professional opinions:
(1) Updating (putting in new stuff) is often costly, and homeowners who update rarely recoup the amount paid, even after two to three years.
(2) Assess your home-selling goals.
If your primary goal is to sell faster, and you do update/stage, don't increase your price. Raising the price tends to increase market time. So, you'd be doing one thing to shorten market time, while at the same time doing another to lengthen it. Probably not helpful.
If your primary goal is to get a higher price than others have gotten for similar homes, updating or staging will probably help with that. However, you have to expect your home to stay on the market longer. (The higher you go in price, the fewer buyers that are available, and the likelihood of longer market time increases.)
(3) How much money a homeowner gets back from updating depends on the condition of the home prior to updating. If the home initially is in substantially below average condition, making certain updates may increase the value enough to recover the cost of updating completely. However, remember the assertion above: "Raising price tends to increase market time."
I hope this information has been helpful. If it has raised other questions, please feel free to add to your question in this forum, or contact me directly.