The Norwegian site Gamereactor got an interview with Jeff Grubb and Ree Sosebee .

The link is a Google translate from the original Norwegian, but some interesting stuff nonetheless.

Quote Originally Posted by article
Is there reason to fear that all the hard core PvPere will play as Asura to be harder to spot?

Jeff Grubb: It is limited in how much I can answer that, but when I play PvP, I tend to choose the opponent through keyboard commands instead of clicking on them with the mouse.

Ree Soesbee: I am not among those who have played most PvP here at ArenaNet, but from what I've played I've never had trouble finding someone I want, nor any Asura. All attacks and abilities are so visual that it is usually very easy to find the person performing them.