I put it down to the base code for Android. Most phones don't have large internal storage, so anything not being saved to the ROM area will be named as going to the SD.
Fair enough, makes sense! TBH I'm struggling to see how I'll manage to fill up the base storage as it is. SD card will be better for music, video and whatnot I suppose. I don't see why I'd want to install apps to SD Card in all honesty.