I agree. Individual letters don't really say much about the typeface, and that's not at all how we use them. When it comes to the use of a mobile OS' main typef

I agree. Individual letters don't really say much about the typeface, and that's not at all how we use them. When it comes to the use of a mobile OS' main typeface, it would make more sense to compare words and short phrases, and I think the two would probably be more distinguishable by a larger set of people than this test will probably show. FWIW I got 70% — some letters are definitely similar, but others were very distinguishable.