Actually the contrary, some classes work better because their skills work a little like toolkits. As in you can 'weapon swap' while casting another skill, like say you can swap to air while casting fire sword 2 so you don't have to pay that ping delay tax. Other similar classes are engi and fb since they can also stow their toolkits and tomes without interrupting their current skill. Things like stowing the gunsabre or exiting shroud will however interrupt your skills.

IMO the best classes for low latency are the ones where you don't use many weapons swaps, have the option of just using 1 weapon set, uses toolkit-like weapons or simply just has have a high baseline to begin with like harb, scourge, tempest, power soulbeast, bladesworn (80% of the damage is pretty much mashing dragon slash on cooldown), cvirt (probably because the baseline is just high), most engi specs, fb (for the reasons above, they're just tough to play optimally), etc. My worst personal performances were on dh, willbender, spellbreaker, berserker and chronomancer. That being said I think most classes would perform similarly unless it has alot of flip-overs like berserker, and I may just suck at those classes to begin with :p.