Not for a standard installation. Your computer manufacturer may have changed it for their custom installation.
Certainly possible (at least it shows 125 as "default" on the display options)
I have an ASUS laptop with a 15" 1080p screen, and I actually prefer it to be tiny, but that's just me. My Lasik procedure went very well.
I'm sure it did. It is personal preference, yes, but I also use a dual-monitor setup at home and with the laptop on a stand about 2.5 feet from me, everything gets iiiiitty bitty.