It's something people just say to hate on MFP. People love to make fun of some custom foods that end up in the general search and you'll end up with serving sizes like, 1 plate, 1 bowl, etc. But those are not very common. Sometimes I'll have some indian food at my aunts house and I'll search for roti and dhal. There really isn't any official result so I just look for one of the higher ones to be on the safe side.