I was looking at the asset kit, where in the wiki it says:
Replaced all the Guild Wars 2™ logos with their® version
IMPORTANT: if you’ve used the old™ version of the logos, please change them to the new® version. The logos are directly accessible in this file: 1.
The Guild Wars 2 logo in the top left hand corner of the wiki is still the TM version.
Just an FYI