I'm doing things where I make changes to my binary data only - but even if I just save binary data from the Introjucer, it resaves BinaryData.h, which is included in AppConfig.h, which is included in everything.
So I have rebuild the world each time I make a tiny change - and there are a lot of tiny changes. Tedious, even on this fairly fast machine.
If there were a new configuration option in the Introjucer to not include BinaryData.h in AppConfig.h, I don't think it would break anything in new projects that were expecting this, and it'd be very handy for cases when you changed the binary data frequently without changing anything else.