I don't carry a 13 every day but I do own one.
Its a great blade, very useful size, the grip is awesome if your hand is average sized, which mine is.
The tip.... well, mine is needle sharp and I would say that it is at greater risk of snapping than the 12, yes indeed.
However I have had my 13 for going on a couple of years now and I havent managed to break it yet. But I am careful with it.
I wouldn't want to drop it opened on a hard floor, no sir.
If you want a 100% worry free Emerson, I would also consider the 8, 10, 11 or 15. Or the Commander.
Or the tantos of course, I'm just not a big fan of em...