object.opEquals return type

[Frank Benoit]

Putting the int/bool performance difference in relation to the whole thing:
Calling opEquals makes a virtual function call. Then at least the given 
object reference is compared once against this. For a useful opEquals 
much more can happen, eg. a dynamic cast...
Now, is it still a _relevant_ performance hit (if any), to use bool 
instead of int here?