I disagree, purely on the basis that there's almost no way to tell if a person has designed a spec specifically for PvP.
Let me give you an example: In the Jedi Guardian's Defense tree, the talent Profound Resolution decreases the cooldown of Resolute (the Jedi Knight's CC breaker) by 30 seconds. Now, to any seasoned MMO player, that would immediately seem like a "PvP talent", since most tactics in PvP revolve around preventing an opponent from fighting back. However, NPC enemies in SWTOR (especially Force-wielding ones) like to crowd-control players with a lot more frequency than I'd seen playing other games. So, while it may not be what the number-crunchers consider "optimal" for a tank or a damage dealer to take, it still has some merit for PvE.
While I can't name any off the top of my head, if there are any talents that drop the cooldown of interrupt abilities, the same can be said for those, since I've encountered countless NPC enemies with channeled damaging attacks that pop up with surprising frequency and used constantly, and you really do need that interrupt usable as much as possible.
So, with no way to really say "there's no doubt in my mind this is a PvP spec", I don't think it's feasible to say that one must always be used for PvP.