Looking at the course colection and the "Skills Measured" for the exam, I'd say that that the course collection would indeed be useful for preparing the exam. Most of the topics (Implement database objects, Implement programming objects, Design database
objects) are besically unchanged from 2008R2 to 2012, so the content of the course collection would be useful to you. You would just need to take a quick look at the list of new features in 2012 (such as Sequences) to be fully prepared for these parts of the
exam.
However, note that the exam also has a section labelled "Optimize and troubleshoot queries" that, as far as I can tell, is not sufficiently covered in Collection 6370, so you will need to find other sources of information to learn about these topics.
