Just a quick followup to my latest post, Microsoft just announced the availability of new HOLS that includes a dedicated lab for the SharePoint support in Visual Studio 2012 Update 1 which includes a practical step-by-step exercises over the following features:
1- Unit testing SharePoint development artifacts using SharePoint Emulator assemblies. Microsoft SharePoint Emulators basically intercept the calls to Microsoft.SharePoint dlls which reduce the testing/maintenace time of SharePoint development.
2- Intellitrace support for SharePoint Improvement.
3- Web and Load testing SharePoint applications.
You can download the lab directly from here.