98.932%* of the time I don't use those, except in my profile of course. On the keyboard I've got, I have to type 2 of them in for them to show up (I have no clue why they made it that way). On my keyboard it's below the ° key (which I only have to type in once to show up) instead of the 6 key. So... I guess that disproves that theory you're hinting at.
*a rough estimate