Probably in last month, I searched Google.com on Google Search Engine and found it’s showing some short descriptions and website url. Just like as normal web results. But, as I know when a website getting popularity or higher page rank or high traffic — Google tracking and showing the results of those sites differently in search engine. (See Images Below)
Now Google also showing their own websites as a popular with two columns. Obviously Google should do that things. In compare, I searched Yahoo.com and both site are popular and showing differently. People loving to see their site on Google like that way. Try to search some popular websites and hopefully will see the real things. Keep Googling.