@TMavC5, that article doesn't mention anything about Original Quality downgrading from the original source file -- it's all about the difference between High Quality and Original Quality. So as far as I can tell, Original Quality is still unchanged and uncompressed.
I just wasn't sure if your main point was that backing up in High Quality compresses the photo (which is definitely true) or that backing up in Original Quality still compresses the photo a little (which isn't the case). As I read your posts again, I think you meant the former, right?