Google Improving Sitelinks Appearance in SERPs

Via my source it comes to my notice that Google is working on sitelinks appearance in search engine results page (SERP). Sitelinks are automatically generated links usually the most visited, most searched, most linked, labels, and the useful page links with quality content and which help users to navigate your website easily. For high reputation websites these sitelinks appears just under the homepage link in a search page by use of most relevant queries.

As you can see from screenshot (created on the base of leaked information; not original) above, Google has not make significant changes in the siteliinks structure. In a new appearance Google arranged sitelinks in a sketched table and adds drop-down double arrow icon along each authority sitelinks (subdomains, categories, etc.).

When you click on this drop-down icon couple of subsitelinks will appear as strip. As an example check above screenshot in which Google shows Problogger.net jobs subdomain as sitelink with subsitelinks.

Besides mentioned things I didn't find any more changes in sitelink structure in Google search. If you guys have any additional information or want to say something please use a comment box, below.