Mobile optimised sites are now a huge ranking factor for tablet & mobile phone search results. This is an except from their announcement:
Starting April 21, we will be expanding our use of mobile-friendliness as a ranking signal. This change will affect mobile searches in all languages worldwide and will have a significant impact in our search results.
You can see out site scores 100% on the mobile optimisation test, Make sure your business is not being penalised by getting in touch for a free mobile audit of you site.