Different Flavors of VST/AU DAWs

I can tell you from my experience that my plugin works in pretty much all DAWs without changing anything in my code for a particular DAW. Well, except for Cubase and this issue:

Of course, Pro Tools has it’s own hoops to jump through just to get it to build, but not to actually run.

When you say “not been able to get our plugins working…”, what exactly happens? Have you tried running them in the debugger?