Keith Duggar asked:
Ok, I'm missing a basic point here. So, out of curiousity:
1) Is there any overhead associated with using 'T%' in place of 'T&'?
2) Are there things that can be done with 'T&' that cannot be done with 'T%'
Yes: A % can only exist on the stack (a CLI limitation). Cases where a C++ program puts a & on the heap are relatively rare -- you'd have to a have a reference member of an object, which is problematic in general -- but % can't be a drop-in replacement for that use of &.