It all depends on the pricing and the market area. The best thing you can do is find a local Agent to inform you on market conditions in your area. Sales are really depending on price, condition and location in todays market.
I think people are just fed up with the maintenance involved with owning a detached home with yard, etc. Why not have the amenities and maintenance covered and live in a nice, newer condo? I certainly get it and according to You, so does San Diego!
Definitely depends on location, complex, type of sale, competition in complex, HOA fees, unit condition, amenities, etc. For example, if there's a large number of homes on the market in a particular complex- the competing units could in turn sit on the market longer/values drop if the supply is larger than the demand.
What specific complex/area are you inquiring about?