I would say that the vast majority of people couldn't use a 5.5" phone with one hand which is the reason HTC and Samsung stopped increasing the size of their flagships when they reached 5.2" or so. Unfortunately LG didn't get that memo and insists on making behemoths of a phone.
I carry my phone in my shirt pocket. Anything much over 5" won't fit. Tried sticking this phone in my shirt pocket at the TM store. Really too tight or won't fit most shirts. Will stick w. my S4 for a while