As per the Google Update information - Overall search result of 2014 in the United States mobile search queries was roughly more than 29% of total search volumes, across the entire industries). Even other countries like Japan, Canada, Australia, United Kingdom, India and more, search queries volume of mobile devices is increased.
Google Panda is not ‘Kung-fu Panda’ but it is Dancing Panda! Everyone is ‘dancing’ with its rhythm and update when it comes for entertain us! Sound’s nuts yeah!! Webmasters and SEOs around the world know what exactly happens when Google panda release any update.
It might be a separate discussion point between experience and attitude and what to choose. It depends upon the project time and quality. It is advisable to go for experience of minimum 3 years if your project is medium to large size. For small work or update work it is OK with less experience WordPress developer.