Everyone, it has been said, enjoys their 15 minutes of fame. But these days, that’s just about all the time homebuyers are allowed to give a house the once-over and make a decision. Southern California realty agent Jeff Dowler calls it real estate’s version of speed dating, and says buyers in today’s inventory-depleted market must be decisive. Now, you’re lucky to get 15 minutes -- a whopping 900 seconds -- to look around. In the end, the key to the short window given buyers these days is being decisive.