You can avoid this by simply browsing to your newly created project and open SitefinityWebApp.csproj with Visual Studio 2013. Most likely your default application for opening csproj files is VS 2012. This could be changed from Set Associations (you can search for it in your start menu search box).
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Sitefinity CMS Ideas&Feedback Portal
and vote to affect the priority of the items