Well done.
I have been doing this type of analysis for a decade now, but have never done the execution histogram like you have done with the case statements. I like that.
It would have been nice if you had covered some of the ways to 'normalize' the executions by replacing sproc parameter values. Perhaps the next article... 🙂
Best,
Kevin G. Boles
SQL Server Consultant
SQL MVP 2007-2012
TheSQLGuru on googles mail service