No. Whilst you can choose the monobook skin for yourself, this is not available as the default because only the new skin wikia is being actively supported by Wikia. This means older skins lack new features, many of which are designed to help newcomers get started on the wiki, so it's important for those people to see the new skin. But it's easy for anyone who prefers the Wikipedia look to visit Special:Preferences and change that for themselves.
See also Help:Customization_policy.