New sitelink format today with less descriptions

[Hoople]

Yesterday:

Title [clickable]
Green URL
Description of site linked above
SiteLink1 [clickable] SiteLink2 [clickable]
SL1 description SL2 description

Today:

Title [clickable]
Green URL
Description of site linked above
right-arrow-icon SiteLink1 [clickable] hyphen SiteLink2 ... [clickable]

[Andy Langton]

There so many sitelink formats out there these days, that I'm never quite sure which is new and which isn't :) Pretty sure I've seen those before though.I believe Google has some sort of "confidence level" which affects the size, number and format of sitelinks - so changes could indicate a change in that confidence level.

[garyr_h]

I've been seeing the one you marked as "Today" for quite some time.

Here's how I have seen it in the past:

Result #1 (if sitelinks are available) would have what you marked as "Yesterday."

Result #2-5 would have what you marked as "Today" if sitelinks are available.

[Sgt_Kickaxe]

New sitelink format tomorrow with more descriptions.
New sitelink format next week with short descriptions.

etc. It's Google's business, focus on yours for better results.

Sitelinks tend to occur when a page is perceived as an index or authority piece and has aggregated a greater amount of rank in relation to the rest of the site. This happens naturally when your category links are sitewide.