Blizzard is adding a number of Achievements or titles for the first people to reach level 80. For example:
The Supreme - First player on the realm to achieve level 80.
Assassin - First rogue on the realm to achieve level 80.
Warbringer - First warrior on the realm to achieve level 80.
Archmage - First mage on the realm to achieve level 80.
Of The Ebon Blade - First death knight on the realm to achieve level 80.
Stalker - First hunter on the realm to achieve level 80.
I'm not sure that these titles are a good idea. Levelling quickly is an impressive feat, but the people who earn these titles are going to be people who take the week off work when WotLK comes out, play 24/7 hours without sleep, or share accounts and power-level up to the cap. I think this behavior is negative, and I don't think that rewarding this type of behavior is a good idea.
As well, there's the potential for a very negative outcome. Imagine if some kid hurts herself in a marathon gaming session in an attempt to get one of these titles. That would be serious negative publicity, precisely when WoW players should be celebrating the release of the expansion.
In a lot of ways, it's like the Grand Marshal fiasco of the old PvP system. That system should have measured who the best PvPers were, but instead it measured who played the most. Ideally, this system rewards those who level the fastest, but it really measures who can devote the largest percentage of the total time to WoW in the first three days.
Finally, it's a lot of titles that are being given out only once, over a time span that is under a week. To me, it seems like a poor use of title resources.
I'm not against a single person being the only person to have a specific title. But I think that such a title should be encompass a large amount of work. For example, the Scarab Lord title (given out during the Ahn'Qiraj event) is appropriately impressive. Weeks of farming bugs, multiple 40-man raids, and ringing the gong for the entire server. That was pretty impressive, and pretty much every Scarab Lord earned her title, and indeed involved her entire server.
To me, the "First to 80" people will not have accomplished anything on the level of the Scarab Lord, and I'm not sure they really meet the standard set for a unique title.
What I'd suggest is that instead of doing "First to 80" titles, and rewarding negative behavior, Blizzard rewards efficient levelling instead. Blizzard already measures how long it takes to level in-game (i.e. the /played command). So pick an aggressive levelling time target, and give a title if the character manages to hit 80 before the deadline. For example, if you went from 70 to 80 in 48 hours /played, you get the title like "Coriel the Quick".
This has several advantages. It's repeatable, so you get multiple uses out of it. It rewards the people who level efficiently, not those who can play the most. If the target is set aggressively enough, people can actually come up with strategies to achieve it. As well, people don't have to kill themselves to get this title. The title would be achievable by someone who plays a couple hours a week, so long as they are super-efficient. Of course, you'd have to figure out how rested XP would interact with this.
An extension of this idea might be to give a unique title to the person who leveled the fastest. But this person could lose their title if someone beats their record. You could do something similar with Grand Master profession titles. Rather than seeing who is the first to 450, give the title to the person who knows the most recipes. If someone else comes along and learns more recipes, the Grandmaster title should change hands. I think these unique titles would be impressive, and more worthy than unique titles for just "the first to X" achievements.