Edit: it seems Arch now uses TTY7 for X by default, so this question is irrelevant
I've used Debian derivates (*buntu, CrunchBang), Mandriva, OpenSuSE, Fedora, name it.. all of them had X server at TTY7 (at least I think it was 7), accessed with:
Ctrl + Alt + F7
Now, I moved to Arch, and it's on TTY1 now -
Ctrl + Alt + F1
All the others are regular TTY's with login prompt.
Why is that? Is it perhaps because Arch uses Systemd?