I'm gonna have to disagree with that statement, lol.
Consulars, especially Sages, can and should be the best PVP class in this game, depending on the player of course.
So far at level 27, I've put up 300k damage and 100k healing at one time. Generally speaking, I'm around 150k healing/damage done currently. I just hit 45 so I can effectively pick up very nice DPS abilities while still retaining the majority of my heals.
This means that:
A. If needed, you can easily dispatch of most people 1v1 and even 2v1. In Alderaan for example, I can easily hold one flag for minutes against multiple opponents by kiting and interrupting their caps, while my team does work on the other side. This of course can change the outcome of a game.
B. The ability to crit over 2.5k with Force in Balance and then heal, VERY EASILY, for over 2.5k will results in two medals. Getting to 75k healing and damage should be fairly easy as well, as long as you know how to play and allow yourself ONLY to DPS when you know your team is safe without healing. This way you can win warzones and end up with 8+ medals per match.
C. Yoda was a Consular
Yea, that's about it. As far as the Consular is concerned, it's by far the most complete class. The trees work very well with each other and if you know what you're doing, you can easily be the deciding factor in winning or loosing a Warzone.