About a month ago, we reported Google was testing classic Sitelinks, i.e. one line Sitelinks. Well, now it seems like we can reproduce the single line Sitelinks.
A Google Webmasters Help thread shows how two different queries return different types of Sitelinks for the same site.
A search for cashforgold returns the standard Sitelinks:
A search for cash4gold returns the classic Sitelinks:
Both are the same site, but showing only half the number of Sitelinks shown on the current Sitelinks format. Plus, the Sitelinks are shown on a single line, as opposed to four lines in two columns.
I wonder if Google will be going back to the classic user interface for Sitelinks?
Forum discussion at Google Webmasters Help.
The thing is, Sitelinks are normally made up anchor text of the links and the numbers might just reflect that and nothing more.