We are upgrading from Matlab 2013b to 2014a and getting some benchmark comparisons would be great to see how our performance will increase now there is no worker limit e.g. running with 12 workers compared to 32 or 64.
Is there a good demo or tool that can be used here to give a visual output that can be compared together?
There are several benchmarks shipping with Parallel Computing Toolbox: http://www.mathworks.com/help/distcomp/examples/index.html#benchmarks
As @Daniel says though, the best benchmark is your actual code because the speedup you will get depends on where the bottlenecks are as you add more workers (amount of memory, contention for memory access, CPU load limits...)