It's something that didn't cross my mind much until I knew what it actually was, around the time I started officiating. I had always just taken my skates to the pro shop at the rink where I was about to play and I think they defaulted to 1/2" if you didn't specify. I tried out 3/4" and it made a world of difference. I even went up to 1" for extra glide which is more helpful as an official, since I was doing more officiating than playing.
For reference, this was in the Phoenix area where the ice tends to be on the soft side.