No it isn't.
http://www.youtube.com/watch?v=Ack0y19Pd-g
This video shows perfectly that there is horizontal FoV changes in the game based on monitor setup. Pay attention to the pipe from 3:14 to 3:20 and you see it distorts (that's what a higher FoV does). So it's already in the game, meaning all the people screaming balance and game design now have nothing to stand on, unless they start advocating for ANet to stop supporting multi monitor setups, since clearly this person has "an advantage over others" (and a much larger advantage than just one monitor with an adjusted FoV would provide). Not to mention that it also shows that different resolutions show more or less of the game world (depending on if the resolution is higher or lower). So should ANet just force everyone into a certain resolution in the interest of balance? Hell no, people would be up in arms if they did this. ANet just needs to let us change our horizontal FoV so that those of us that are effected by it can play without suffering.
From around 10:35 til the end of the vid you can see the tiles on the floor are very distorted on the right side, probably the most obvious example of this setup having a higher FoV than a single monitor setup has.
And if you think the increased FoV with multimonitor setups isn't intentional then watch this one.
http://www.youtube.com/watch?v=5N_q4-sC3v4
It's an official ANet setup and since you actually get to see all three screens separately it shows the higher FoV much better than the other vid did (on an official ANet setup).
You can also directly change your FoV by going into windowed mode and make the vertical space smaller. The game automatically gets its FoV based on your game screens aspect ratio. That's why a 3 monitor setup (~16:3 aspect ratio) has a higher FoV than a single monitor setup (~16:9 aspect ratio)
Edit: I know the first rant seems weird for this therad, that's because I just copy/pasted it from a different thread that can be found here:
http://www.guildwars2guru.com/topic/...eling-nauseos/