The updated Adwords help document changed the mobile device site link limit from 4 to 8. So the amount of site links for mobile devices went from 4 links to 8 and that means it doubled.
This is a pretty good jump in the amount of site links that you can add to an ad for a mobile device. If you had any doubts that mobile will begin to play a much larger and larger role in the future you can take some of the changes and see how they impact mobile. All of the latest changes have been regarding Mobile. Mobile is the focus for the future so don’t get left behind.
If you want to learn more about Google adwords management http://ysais-seo.com/austin/ppc-marketing-pay-per-click-consultant/
If you want to read more about the topic you can check out an article here: http://searchengineland.com/google-adwords-doubles-number-sitelinks-search-ads-281397