I mostly agree, and that is why I mentioned that you should follow the general design guidelines for your respective platform. However, when creating a web app,

I mostly agree, and that is why I mentioned that you should follow the general design guidelines for your respective platform. However, when creating a web app, general guidelines are more "implied." The biggest reason why consistency is more important than following platform guidelines is for cross-platform apps available on multiple devices that have different platform design guidelines. It's obviously not feasible (and I would argue not user-friendly either) to switch the order of action controls for the same app on different devices, especially when the app is available via a web interface as well as native.