Arch people tend to want people to know they use Arch (btw). You'll also find a lot of posts about getting Arch working.

Debian people tend to be too busy doing other things on their computers besides getting them working, so you'll hear about it less.

(Important: I'm not dumping on either distro here. Some people, myself included, like Arch exactly because it's fun to play with and set up. Debian's older packages tend to mean a more stable system. Use what you like.)