I’ve seen that google sitelinks displayed in a new layout over the past few days,  but noticed for the first time today that even sites that are not number 1 in the serps are displaying the new layout.

An example can be found if searching in the UK (using google.co.uk) for the phrase free online advertising

One of my sites comes up at number 1, (with no sitelinks), but the site that appears in number 2 has the new layout sitelinks,

The above screen shot shows my site in number 1, and another site in number 2 with the new layout sitelinks.